Ferret

Encyclopedia : F : FE : FER : Ferret

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''This article is about the mammal. For the military vehicle, see Ferret armoured car.

In general use, a ferret is a domestic ferret (Mustela putorius furo), a creature first bred from the wild European polecat or steppe polecat at least 2,500 years ago. Several other small, elongated carnivorous mammals belonging to the family Mustelidae also have the word "ferret" in their common names, including the endangered black-footed ferret.

Contrary to popular belief, ferrets are not rodents, but members of the mustelid family, which also includes weasels, badgers and otters.

History

It is unknown exactly when ferrets were first domesticated, but ferret remains have been dated to 1500 BC^{[[Citing sources citation needed]]}. Some say the ancient Egyptians had ferrets, but it is more likely that Europeans visiting Egypt saw cats and thought using a small carnivore to protect grain stores was a useful idea.

The ferret was most likely bred from the European Polecat (Mustela putorius), though it is also possible that ferrets come from the steppe polecat (Mustela eversmanni) or some hybridization thereof. All three species have unique similarities and differences.

Wild ferrets, in the form of ferret-polecat hybrids, do still exist. New Zealand has the world's largest feral population of these hybrids [link]. (See below for more details).

Elizabeth I of England used to give ferrets as gifts, which were highly prized. Also a ferret named 'Quebec' is now the mascot for the Yorkshire Regiment in the British Armed Forces^{[[Citing sources citation needed]]}

Ferreting

For hundreds of years, the main use of ferrets was for hunting, or ferreting. With their long, lean build and curious nature, ferrets are very well equipped for getting down holes and chasing rodents and rabbits out of their burrows. They are still used for hunting in some countries, including the United Kingdom and Australia, where rabbits are considered a plague species and the combination of a few small nets and a ferret or two remains very effective despite technological advances. However, the practice is illegal in several countries, where it is feared that ferreting could unbalance the ecology.

Caesar Augustus sent ferrets (named 'viverrae' by Plinius) to the Balearic Islands to control the rabbit plagues in 6 BC.

Ferrets were first brought to the New World in the 17th century and were used extensively from 1860 until the start of World War II to protect grain stores in the American West. They first became popular as pets in the mid-1970s, chiefly thanks to Dr. Wendy Winstead, a veterinarian and former folk singer who sold ferrets to a number of celebrities and made many TV appearances with her own ferrets.

Ferrets as pets

In many ways, ferrets act like kittens that never grow up. They have energy, curiosity, and potential for chaos all their lives, and are always keenly aware of their surroundings. However, they are far more people-oriented than cats, and most actively elicit play with their owners.

Their lifespan can vary widely, but usually falls between six and eight years, though in rare cases they can live into their early teens.

Dangers to ferrets

It has been suggested that ferrets were bred for curiosity; whether this is true or not, their curiosity often exceeds their common sense. Ferrets are very good at getting into holes in walls, cupboards, or behind household appliances, where they can be injured or killed by electrical wiring, fans, and other dangerous items. Many enjoy chewing items made of soft rubber, foam, or sponge, which present the risk of intestinal blockage and death if ingested. Screen doors are no match for a ferret's claws, and dryer vents often become escape routes to the outdoors. Unlike dogs and cats, most lost ferrets have little homing instinct and cannot survive as strays, causing them to die within a few days unless found.

Recliners are the number-one cause of accidental death in ferrets today. Ferrets will often climb inside the springs and then be squashed and injured or killed once the chair is put into a reclined position. Fold-out sofas cause similar problems.

For these reasons, steps must be taken to "ferret proof" a home before acquiring one as a pet. Ferret proofing a house is an ongoing task that involves carefully going through each room, removing items dangerous to ferrets and covering over any holes or potential escape routes. Ferrets can open improperly-latched cupboards or doors by rolling over and clawing at the bottom edge, so many owners buy childproof latches or keep cleaning products in high, out-of-reach places. However, ferrets can fit through holes as small as an inch square, making some childproof latches ineffective.

Diet

Ferrets are obligate carnivores; their natural diet consists entirely of meat, and they lack the ability to digest vegetable matter.

There are a wide variety of ferret foods available at pet shops worldwide. A cat or kitten food can also be used, as long as it provides the high protein and fat content required by the ferret's metabolism. Ideally, a ferret food should contain between 32-38% protein and between 15-20% fat, with the top three ingredients meat-based.

Ferrets usually have a fondness for sweets like raisins, bananas, peanut butter, and pieces of cereal. Such treats should be given sparingly (if at all), as their high sugar content has been linked to insulinoma and other diseases.

Some ferret owners feed a meat-based diet consisting of chicken, organs, bone, and whole prey like mice and rats. This is still common in Europe, and is becoming increasingly popular in the US as concerns are raised about processed ferret foods' high sugar and carbohydrate content.

Activity

Ferrets spend most of their time (14 to 18 hours a day) sleeping, but when awake they are very active, exploring their surroundings relentlessly. Ferrets are crepuscular, meaning they are most active during dawn and dusk. If kept in a cage, they should be let out for a few hours daily to get exercise and satisfy their curiosity. When ferrets are kept in their cages for too long, their walking ability can be affected and they may become subject to depression or "cage stress". Ferrets, like cats, can use a litter box with training, though are not always 100% litter box trainable.

Ferrets are also fine backyard companions and especially enjoy "helping" their owners in the garden. However, they should not be allowed to wander; ferrets are fearless to the point of foolishness and will get into whatever holes they will find, including storm drains. Whenever they are outside, they should be closely supervised and preferably kept on an "H"-shaped harness leash designed for ferrets.

Play

Since ferrets are social animals, many of them are playful by heart and are happy to play with humans. "Play" for a ferret can involve hide-and-seek games, or some form of predator/prey game in which either the human attempts to catch the ferret or the ferret to catch the human.

Like a playful kitten, ferrets usually will not actually "bite" their human companions, but instead gently grab a toe or finger in their mouth and roll around with it. However, ferrets that have been abused or are in extreme pain will bite a human. Ferrets have strong bites and can sometimes bite through human skin, especially children's. Once properly socialized, however, domesticated ferrets will very rarely, if ever, bite humans.

Most kitten toys work well with ferrets. Toys made of rubber or foam should be avoided, however, as ferrets can chew off and swallow small pieces, causing or leading to intestinal blockage. Ferrets love playing tug of war with toys and stuffed animals.

When ferrets are especially excited, they will perform the weasel war dance, a frenzied series of sideways hops. This is often accompanied by a soft chuckling noise, called dooking by many ferret owners.

Ferrets and children

Ferrets can make wonderful pets for children. However, like all other domesticated animals, they should not be allowed unsupervised near infants or very young children. Given that young children and ferrets can both be excitable and prone to rough play, interaction between ferrets and young children must always be closely supervised -- for the protection of both the children and the ferrets.

Social nature

Ferrets are extremely social animals, and most enjoy playing and interacting with other ferrets. They frequently bond emotionally with other ferrets, and bonded pairs are often observed to die just a few days apart from each other. Many ferret owners recommend owning two or three ferrets for this reason, but there is nothing wrong with owning one ferret, provided that it receives lots of play time and attention.

Ferrets have been known to play with household cats and small non-aggressive dogs. However, great care must be taken when introducing ferrets to any new animal, particularly terriers and other breeds with instincts for catching ferret-sized prey. Ferrets will normally not get along with rabbits, rats, and mice, which comprise part of its diet in the wild.

Grooming and care

Domestic ferrets need to be vaccinated against the canine distemper virus, which is quickly deadly to them. Many US states also require a rabies vaccination, although rabies rates in ferrets are extremely low and there are no documented instances of a ferret passing rabies to a human.

Ferrets need their nails clipped and ears cleaned on a regular basis. Most ferrets also shed twice a year, in the spring and fall; during this time, it is a good idea to brush them regularly and give them a laxative to protect against ingesting too much fur.

Frequent bathing is not necessary. Most sources recommend bathing no more frequently than once a month, and many owners don't bathe their ferrets at all unless something needs to be washed off. Over-frequent bathing can actually increase a ferret's natural smell, as its skin works overtime to replace the oils lost in the bath.

It is recommended to bring your ferret to a veterinarian for a yearly checkup. Ferrets often hide symptoms of illness very well, this is because of an instinct to not appear weak to predators in the wild. Any out-of-the-ordinary behavior is good cause for a consultation.

Other uses of ferrets

Ferrets have been used to run wires and cables through large conduits. They have been employed in this way by event organizers in London. TV and sound cables were run by ferrets both for the wedding of Charles, Prince of Wales to Lady Diana Spencer, and for the Millennium concert in Greenwich Park*[link].

Since they share many anatomical and physiological features with humans, ferrets are extensively used as experimental subjects in biomedical research, in fields such as virology, reproductive physiology, anatomy, and endocrinology.

In Yorkshire, England, ferrets have been used for the sport of ferret legging.

Ferret biology and health concerns

Like many other carnivores, ferrets have scent sacs near their anus. Secretions from these are used in scent marking. It has been shown that ferrets can identify whether such a mark was left by a male or a female ferret, without recognizing the individual. Like a skunk, a ferret can release this scent when startled or scared, but the smell dissipates rapidly. Most pet ferrets in the US are sold with these anal sacs removed, although this does not affect a ferret's natural musky scent. To eliminate this scent entirely, desexing is required, since it is through this odor that female and male ferrets find each other during the mating season.

Many domestic ferrets are known to suffer from several distinct health problems. Among the most common are cancers affecting the adrenal glands, pancreas, and lymphatic system. Certain breeds may also have a genetic defect known as Waardenburg syndrome .

Adrenal disease

Adrenal disease, a growth of the adrenal glands that can be either hyperplasia or cancer, is most often diagnosed by symptoms like unusual hair loss, increased aggression, and (in the case of females) an enlarged vulva. Even if the growth is benign, it can still cause a hormonal imbalance which can have devastating effects on the ferret's health.

Treatment options include surgery to excise the affected glands, melatonin implants, steroids and/or hormone therapy. The cause of adrenal disease is unknown, but speculated triggers include unnatural light cycles, diets based around processed ferret foods, and the premature desexing of pet-store ferrets. Others have suggested that the problem is hereditary.

Insulinoma

Ferrets are also known to suffer from insulinoma, a cancer of the pancreas. The growth of cancerous nodules on the lobes of the pancreas sometimes, but not always, leads to an increase in the production of insulin, which regulates the rate at which the ferret's body metabolizes blood glucose. Too much insulin will cause blood sugar to drop, resulting in lethargy, seizures, and ultimately death. Symptoms of insulinoma include episodes of lethargy, drooling, pawing and/or foaming at the mouth, staring "blankly" into space, and seizures.

Like adrenal cancer, the exact cause of insulinoma is unknown. It is speculated that the diets of domestic ferrets are too far removed from the natural diets of their polecat ancestors, and include too much sugar or simple carbohydrates.

Treatment for insulinoma may include surgical excision of the cancerous lobes, pharmaceutical treatment with steroids that suppress the production of insulin, supplemental changes in diet (most often poultry-based baby food), or a combination thereof. Unfortunately, the growth of the tumors cannot be completely stopped, and the ferret will eventually suffer a reoccurrence of symptoms.

Lymphoma

Lymphoma/lymphosarcoma is the most common malignancy in ferrets. Ferret lymphosarcoma occurs in two forms -- juvenile lymphosarcoma, a fast-growing type that affects ferrets younger than two years, and adult lymphosarcoma, a slower growing form that affects ferrets four to seven years old.

In juvenile ferret lymphosarcoma, large, immature lymphocytes (lymphoblasts) rapidly invade the thymus and/or the organs of the abdominal cavity, particularly the liver and spleen. In adult ferret lymphosarcoma, the lymph nodes in the limbs and abdominal cavity become swollen early on due to invasion by small, mature lymphocytes. Invasion of organs, such as the liver, kidney, lungs, and spleen, occurs later on, and the disease may be far advanced before symptoms are noticeable.

As in humans, ferret lymphosarcoma can be treated surgically, with radiation therapy, chemotherapy or a combination thereof. The long-term prognosis is rarely bright, however, and this treatment is intended to improve quality of life with the disease.

Viral diseases

ECE (epizootic catarrhal enteritis), is a viral disease that first appeared in the northeastern US in 1994, is an inflammation of the mucous membranes in the intestine. In ferrets, the disease manifests itself as severe diarrhea (often of a bright green color), loss of appetite, and severe weight loss. The virus can be passed via fluids and indirectly between humans. Although it was often fatal when first discovered, ECE is less of a threat nowadays with the right supportive care.

ADV, the Aleutian disease virus, is a parvovirus originally found among mink in the Aleutian islands in the early 20th century. In ferrets, the virus affects the immune system (causing it to produce non-neutralizing antibodies) and many internal organs, particularly the kidneys. There is no cure or vaccine for the disease, and ferrets may carry the virus for months or years without any external symptoms. As a result, many ferret organizations and shelters recommend that owners test their pets for the virus regularly, separating them from other ferrets if they test positive.

Waardenburg Syndrome

Ferrets with a white stripe on their face or a fully white head, primarily blazes, badgers, and pandas, almost certainly carry a congenital defect known as Waardenburg syndrome. This causes, among other things, a cranial deformation in the womb which broadens the skull, causing the white face markings but also partial or total deafness. It is estimated as many as 75% of ferrets with visible Waardenburg signs are deaf. Beyond that, the cranial deformation also causes a higher instance of stillborn ferret kits, and occasionally cleft palates. Because of this, many breeders will not breed Waardenburg-patterned ferrets.

Terminology and Coloring

Male ferrets are called hobs; female ferrets are jills. A spayed female is a sprite, and a neutered male is a gib. Ferrets under one year old are known as kits. A group of ferrets is known as a "business".

Ferrets come in a variety of coat colors and patterns, the most common of which are as follows:

Colors:

• albino(red-eyed white)
• polecat
• sandy
• black-eyed white
• panda
• black eyed silver
• black footed

Color concentrations:

• point
• roan
• solid
• standard

Markings:

• blaze
• mitt

White ferrets were favored in the Middle Ages due to the ease in seeing them in thick undergrowth, and ownership was restricted to those earning at least 40 shillings a year (a large sum then). Leonardo's painting Lady with an Ermine is likely mislabeled; the animal is probably a ferret, not a stoat, for which "ermine" is an alternative name (the latter strictly applying only to the animal in its white winter coat). Similarly, the "Ermine portrait of Queen Elizabeth the First" shows her with her pet ferret, who has been decorated with painted-on heraldic ermine spots.

Ferrets as pests

In 1877, farmers in New Zealand demanded that ferrets be introduced into the country to control the rabbit population, which was also introduced by humans. Five ferrets were imported in 1879, and in 1882-1883, 32 shipments of ferrets were made from London, totaling 1217 animals. Only 678 landed, and 198 were sent from Melbourne, Australia. On the voyage, the ferrets were mated with the European polecat, creating a number of hybrids that were capable of surviving in the wild. In 1884 and 1886, close to 4000 ferrets and ferret hybrids, 3099 weasels and 137 stoats were turned loose. [link] Concern was raised that these animals would eventually prey on indigenous wildlife once rabbit populations dropped, and this is exactly what happened as New Zealand bird species had evolved free from mammalian predators.

Ferrets in literature and the media

• Aristophanes, a Greek playwright of note, made references to ferrets in the satire 'The Achaeans' written around the year 450 B.C., comparing the Achaeans to ferrets, who were widely regarded as thieves.

• The title character of the short story Sredni Vashtar by Saki (pseudonym of H. H. Munro) is a pet "polecat-ferret" secretly kept by a young boy.

• The children's book Zucchini by Barbara Dana is about a boy and his pet ferret. However, the author gets a number of basic ferret facts wrong, claiming that they are vegetarian rodents.

• The BBC Children's TV magazine programme Xchange (CBBC) stars the puppet Vinnie, a wheeler dealer, general mischief making ferret.

• In the film The Big Lebowski, Lebowski is attacked in the bathroom by a "Marmot" which is really a ferret.

• In the film Kindergarten Cop, John Kimble (played by Arnold Schwarzenegger) owns a pet ferret, which later becomes the mascot of his kindergarten class and saves his life by biting the main antagonist near the end of the film.

• Richard Bach, author of Jonathan Livingstone Seagull, has written three books starring ferrets as part of his Ferret Chronicles series.

• In the 2004 romantic comedy Along Came Polly, Jennifer Aniston's character, Polly, owns a ferret named Rodolfo who often runs head-first into stationary objects (to great comedic effect). The ferret was also featured in the promotional material for the film.

• In Starship Troopers, Carl owns a ferret called 'Cyrano' that he has in a way neglected, as Cyrano is attention seeking, and Carl sends it on a mission to do something psychically.

• The film The Beastmaster has two ferrets which appear as major characters. The film's protagonist usually kept them in a small pouch attached to his belt.

• In the fourth Harry Potter book and film, Harry Potter and the Goblet of Fire, the character Draco Malfoy is turned into an albino ferret.

• HTV Wales' long-running investigation series The Ferret has a ferret in the main titles and also has dictionary text on the titles describing the word "ferret".

• Sluggy Freelance, an online comic strip, has a ferret named Kiki. She exemplifies two main ferret traits- curiosity and hyperactivity.

• Ferrets appear in almost every book of Brian Jacques's series, Redwall.

• On [[Degrassi: The Next Generation]], Ellie (Stacy Farber) adopts a ferret before moving in with Sean (Daniel Clark), but the pet soon dies after gnawing on an electrical cord.

Regulation on ferrets as pets

Australia

It is illegal to keep ferrets as pets in Queensland or the Northern Territory; in the ACT a license is required.

Iceland

Selling, distributing, breeding and keeping ferrets is illegal in Iceland.

New Zealand

It has been illegal to sell, distribute or breed ferrets in New Zealand since 2002.

Portugal

It is illegal to keep ferrets as pets in Portugal. Ferrets can only be used for hunting purposes and can only be kept with a government permit.

United States

Ferrets were once banned in many US states, but most of these laws were rescinded in the 1980s and 90s as they became popular pets. California and Hawaii are the only states that currently have blanket laws against ferret ownership. The territory of Puerto Rico also has a similar law.

Ferrets are also restricted by individual cities, such as New York City, Washington, DC, Beaumont, Texas, and Bloomington, Minnesota. They are also prohibited on many military bases. A permit to own a ferret is needed in other areas, including New Jersey and Rhode Island. They were legalized in Dallas, Texas in August 2005.

Travel regulations

Airline policies

Note that most airlines require advance booking for pet travel and may levy additional fees. Also, requirements concerning pet carrier size, weight, and construction vary from airline to airline.

Airline	Cargo	Cabin	Details	Notes
Air Canada	Yes	No	[link]	No travel between December 19 and January 9 or between June 20 and September 10.
Delta Air Lines	Yes	Yes	[link]
Luxair	Yes	Yes	[link]	Restrictions apply on flights to the UK.
Ryan Air	No	No	[link]

Train policies

Company	Cargo	Cabin	Details	Notes
Deutsche Bahn	N/A	Yes
Eurostar	No	No	[link]

Import laws

Canada

Ferrets brought from anywhere except the US require a Permit to Import from the Canadian Food Inspection Agency Animal Health Office. Ferrets from the US require only a vaccination certificate signed by a veterinarian. Ferrets under three months old are not subject to any restrictions for importation. [link]

European Union

As of July 2004, dogs, cats, and ferrets can travel freely within the European Union under the PETS travel scheme. To cross a border within the EU, ferrets require at minimum an EU PETS passport and an identification microchip (though some countries will accept a tattoo instead). Vaccinations are also required; most countries require a rabies vaccine, and some also require a distemper vaccine and treatment for ticks and fleas 24 to 48 hours before entry. PETS travel information is available from any EU veterinarian or on government websites.

United Kingdom

The UK accepts ferrets under the PETS travel scheme. Ferrets must be microchipped, vaccinated, and documented. They must be treated for ticks and tapeworms 24 to 48 hours before entry. They must also arrive via an authorized route. Ferrets arriving from outside the EU may be subject to a six-month quarantine. [link]

Australia

Ferrets cannot be imported into Australia at all. A draft report has been done, but nothing further has been done [link]

See also

• Marshall Farms, the largest breeder of ferrets in the United States

External links

Organizations and shelters

• [International Ferret Congress]
• [Support Our Shelters] - A list of ferret shelters across the United States, Canada and Europe
• [American Ferret Association]
• [Ferret Community with focus on California ferret owners and legalization]
• [Legalize Ferrets Organization] (California)
• [Californians for Ferret Legalization]
• [Texas Ferret Lovers Rescue (TxFLR)]
• [Emmett Ferret Shelter, Idaho]
• [The Ferret Lovers' Club of Texas]
• [Heart of Ohio Ferret Association & Rescue]
• [New York City legalization campaign]
• [The NSW Ferret Welfare Society (Australia)]
• [Motor City Ferrets, Michigan]

Biology, Veterinary Science, Diet

• [the Ferret Natural History FAQ]
• [Ferret Central: One of the most complete ferret resources on the Internet.]
• [Ferret Color Chart.]
• [Ferret universe Lymphoma/Lymphosarcoma]
• [Lymphoma in the Ferret]
• [The Hidey Hole] - Ferret articles and ferret community resources.
• [Rethinking The Ferret Diet - Info about species-appropriate diets, and the negative effects of commercially prepared diets, written by a veterinarian.]

Other

• [Information on travelling with Ferrets (in the United States)]

 

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