Domestic Rabbit

Domestic rabbit, selectively bred（圖片來源：Friedrich Haag，採用 CC BY-SA 4.0 授權）

The domestic rabbit (Oryctolagus cuniculus domesticus) is the domesticated form of the European rabbit (Oryctolagus cuniculus), developed through long-term human selection. Today, hundreds of breeds exist worldwide. Rabbits were first enclosed and managed by the Romans, primarily as a source of meat and fur. During the Middle Ages, French monks reportedly consumed rabbit meat during fasting periods as a substitute for other meats. By the nineteenth century, with the rise of animal fancying and companion animal culture, rabbits gradually became appreciated as ornamental and companion animals. In the late twentieth century, the publication of the book House Rabbit Handbook helped popularize the concept of the “house rabbit,” encouraging many people to keep rabbits indoors in a manner similar to cats or dogs.

The wild European rabbit is native to the Iberian Peninsula of Europe. In nature it inhabits grasslands, forest edges, and open landscapes, where it constructs burrows and lives in social groups. Domestic rabbits retain several ancestral traits, including a tendency to chew, a strong inclination to dig, and a crepuscular activity pattern, meaning they are most active at dawn and dusk. However, after thousands of years of selective breeding, domestic rabbits are generally more docile, and they display remarkable diversity in body size, coat color, and fur texture. Modern domestic rabbits may live for more than ten years and can develop strong emotional bonds with humans. Many individuals can learn to use a litter area, respond to their names, and interact socially with their caregivers. At the same time, rabbits possess delicate skeletal structures, particularly a vulnerable spine, which makes careful handling essential.

Rabbits also communicate through a variety of behaviors. When excited or joyful they may leap into the air and twist their bodies in a movement often referred to as a “binky.” When alarmed or uneasy, they may strike the ground forcefully with their hind feet to signal danger. Although generally quiet animals, rabbits have strong social needs. A rabbit kept alone without sufficient interaction may develop anxiety or destructive behaviors due to social deprivation.

Wild European rabbit（圖片來源：JJ Harrison，採用 CC BY-SA 3.0 授權）

Domestic rabbit, selectively bred（圖片來源：Sunandshade，採用 CC BY-SA 4.0 授權）

Domestic rabbit, selectively bred（圖片來源：Paul Korecky，採用 CC BY-SA 2.0 授權）

Housing Requirements in Captivity

Providing a suitable environment is essential for maintaining the health and well-being of domestic rabbits. Their enclosure should be spacious, secure, and designed in a way that reflects their natural behavioral tendencies. Many commercially available cages are too small and restrict normal movement. Ideally, the living space should be at least four times the length of the rabbit's body. For small to medium breeds, an enclosure measuring at least 60 cm in length, width, and height is recommended, while large breeds require spaces exceeding 90 cm in each dimension. In addition to a permanent enclosure, rabbits should be given access to an exercise area or playpen where they can run and explore freely for several hours each day.

Wire flooring should be avoided because rabbits lack thick foot pads. Standing on wire for prolonged periods may lead to painful foot lesions and ulcers. A solid floor covered with thick paper-based bedding or other non-toxic absorbent materials is recommended. Soiled bedding should be removed daily, while the entire bedding layer should be replaced and the enclosure disinfected on a weekly basis. The living area must be well ventilated and should not be placed in direct sunlight or in excessively hot and humid conditions. Rabbits are not efficient at dissipating heat, and when ambient temperatures exceed approximately 27°C they are at risk of heat stress. Cooling measures may therefore be necessary during hot seasons.

A hiding shelter should also be provided inside the enclosure. This allows rabbits to retreat and rest in a concealed space, which reflects their natural burrowing instincts and helps reduce stress. Chewing is an essential behavior for rabbits, so safe chewable objects such as untreated wooden toys, woven grass items, or specialized chew sticks should be provided. These items also help prevent rabbits from gnawing on hazardous materials such as electrical cables or furniture. During free-roaming time, electrical wires should be covered or removed, and toxic plants and chemical cleaners should be kept out of reach to prevent accidental ingestion.

Feeding Conditions

Rabbits are herbivorous animals, and the foundation of their diet must be unlimited access to high-fiber hay. One of the most commonly used types is timothy hay (Phleum pratense). Other suitable hays include orchard grass (Dactylis glomerata), oat grass (Arrhenatherum elatius), and alfalfa. Young rabbits, lactating females, and pregnant does require higher levels of protein and calcium, making alfalfa an appropriate choice for these life stages. However, adult rabbits that consume excessive amounts of alfalfa over long periods may develop obesity or urinary stones. Beyond its nutritional value, hay also serves an essential mechanical function by helping to wear down the teeth. Rabbit teeth grow continuously throughout life, and insufficient chewing can lead to dental overgrowth, oral ulcers, and reduced appetite.

In addition to hay, rabbits may receive moderate amounts of commercially formulated rabbit pellets. However, pellets should not dominate the diet, as excessive consumption may lead to obesity. Fresh vegetables should also be offered daily. Suitable options include carrot tops, cilantro, green bell peppers, broccoli leaves, and cucumber. Fruits contain higher levels of sugar and should only be provided occasionally as treats. Examples include apples, pears, and berries, typically once or twice per week. When fresh produce is offered, any uneaten portions should be removed within several hours to prevent spoilage and digestive problems. Certain foods must never be given to rabbits, including onions, garlic chives, avocados, and branches from stone fruit trees such as peach, plum, or apricot, as these materials are toxic to rabbits.

Fresh drinking water must always be available. Heavy ceramic bowls are recommended to prevent tipping, although sipper bottles with metal drinking tubes are also commonly used. The water supply should be replaced daily to maintain digestive health. Suitable water sources include bottled mineral water or previously boiled and dechlorinated water.

Breeding Conditions

Rabbits are well known for their high reproductive capacity. In many cultures, rabbits symbolize fertility due to their ability to reproduce rapidly. Small breeds may reach sexual maturity at approximately four to five months of age, medium-sized breeds at around six months, and large breeds may require up to eight months before breeding becomes possible. The gestation period of the female rabbit is approximately thirty days, and a litter typically contains four to twelve kits. Newborn rabbits are born blind and hairless. Their eyes usually open around ten days after birth, and by four weeks of age they begin exploring solid foods.

Although breeding occurs readily under suitable conditions, unplanned reproduction often creates significant challenges for pet owners and may contribute to abandonment of young rabbits. For this reason, sterilization is commonly recommended once rabbits reach sexual maturity if breeding is not intended. Neutering male rabbits can reduce aggressive behavior and prevent urine spraying associated with hormonal marking. Spaying female rabbits helps prevent uterine tumors and mammary disorders. If an accidental pregnancy occurs, the owner should provide a quiet and warm nesting box and avoid disturbing the mother excessively. Adequate supplies of energy-rich feed and hay are necessary to ensure that the mother can produce sufficient milk for the litter.

For most companion animal owners, responsible rabbit breeding requires careful planning and sufficient resources to guarantee that offspring remain healthy and can be placed in appropriate homes.

Preventing Invasive Spread

Domestic rabbits are now found throughout much of the world. It is important to recognize that these animals are products of human domestication and do not naturally belong in most ecosystems. When domestic rabbits are abandoned, intentionally released, or escape into the wild, they can create severe ecological consequences. A well-known example occurred in Australia. After rabbits were introduced by humans, irresponsible releases and escapes allowed populations to expand rapidly. Because natural predators were scarce, rabbit numbers exploded within only a few decades, causing major agricultural damage and widespread degradation of grassland ecosystems. Even today, the Australian state of Queensland strictly prohibits the keeping of domestic rabbits, and violations may result in substantial fines. This case demonstrates how releasing domestic rabbits into the wild can produce ecological impacts that are extremely difficult to reverse.

For this reason, rabbit owners must follow the principle of never abandoning or releasing their animals into natural environments. If an owner is unable to continue caring for a rabbit, the appropriate course of action is to contact a legitimate animal shelter or arrange a responsible rehoming with another suitable caretaker. Responsible pet ownership includes not only protecting the life and welfare of the animal itself, but also ensuring that domestic animals do not harm native wildlife or local ecosystems.

Author: Shui-Ye You