Rats can and do eat rabbits, but with an important qualifier: they almost exclusively target newborn kits rather than grown rabbits. An adult rabbit outweighs even a large brown rat by a factor of three or more and can deliver powerful kicks with its hind legs, making it a poor target for a rodent. Newborns, however, are blind, hairless, and essentially defenseless for their first ten days of life, which makes them exactly the kind of vulnerable prey that rats exploit.
What Rats Actually Eat
Rats are true omnivores with one of the broadest diets in the mammal world. Brown rats (the common species found nearly everywhere humans live) eat grains, fruit, vegetables, insects, eggs, small birds, fish, carrion, and garbage. They are not built as specialized predators. They lack the sharp talons and powerful bite of a weasel or the speed of a hawk. Instead, rats succeed by being flexible and opportunistic, eating whatever is available and easiest to obtain with the least risk.
This opportunism is the key to understanding their relationship with rabbits. A rat does not hunt rabbits the way a fox does. It does not stalk, chase, or overpower them. What it does is find vulnerable, immobile prey and take advantage. In practice, that means raiding nests.
Why Newborn Rabbits Are So Vulnerable
Rabbit kits are born in an unusually helpless state compared to many other mammals. A newborn kit weighs roughly 30 to 50 grams, has no fur, cannot see or hear, and is unable to move beyond a slow crawl. The mother rabbit nurses the litter only once or twice per day, typically at dawn and dusk, spending the rest of her time away from the nest to avoid drawing predators to it. This strategy works well against predators that track adult rabbits by sight or scent, but it leaves the kits unguarded for long stretches.
A rat discovering an unattended nest full of warm, immobile newborns has found an easy meal. The kits cannot flee, fight back, or even alert their mother. Rats are excellent at locating nests, too. Their sense of smell is acute, and they are persistent explorers of burrows, holes, and ground-level cavities. Wild rabbit nests, which are shallow depressions lined with fur and grass, are not structurally difficult for a rat to access.
By around ten to twelve days old, rabbit kits open their eyes, grow a coat of fur, and become mobile enough to scatter when disturbed. At that point, the risk from rats drops considerably. The window of extreme vulnerability is roughly the first two weeks of life.
Wild Rabbit Nests and Rat Predation
In wild settings where brown rats and European rabbits overlap, nest predation by rats is a recognized problem, though it is hard to quantify precisely. Rabbits nest in shallow scrapes on the ground (called “forms”) or in burrow systems, and rats inhabit many of the same environments: hedgerows, field edges, farm buildings, and woodland margins. The overlap in habitat means encounters are common.
Mother rabbits try to conceal their nests by covering them with a plug of fur and vegetation when they leave, and they deliberately stay away to avoid leaving scent trails. These defenses reduce detection by larger predators like foxes and birds of prey. Rats, however, forage at ground level through dense cover and are more likely to stumble across a concealed nest. Once a rat finds a nest, it can return to it repeatedly until the litter is consumed.
Quantifying how many wild rabbit litters are lost to rats specifically is difficult because nest predation is often lumped together across all predator types in field studies. Researchers using trail cameras and nest monitoring have documented rats, stoats, weasels, magpies, and crows all raiding rabbit nests. The contribution of rats probably varies a lot depending on local rat density and the availability of other food sources. In areas with abundant grain or garbage, rats may largely ignore nests. In leaner environments, the protein from a litter of kits becomes more attractive.
Can a Rat Kill an Adult Rabbit?
This is the question many people are really asking, and the answer is: almost never through direct predation. An adult domestic rabbit weighs anywhere from 1.5 to 5 kilograms depending on the breed. A brown rat typically weighs 200 to 500 grams. The size difference alone makes direct attack impractical. Adult rabbits can kick with enough force to injure or kill a rat, and they are fast enough to flee in open space.
There are rare anecdotal reports from rabbit breeders of rats attacking adult rabbits, particularly at night when the rabbit is confined in a hutch and cannot escape. In these cases, the rat typically gnaws at the feet or ears of a restrained rabbit rather than attempting to kill and consume it outright. These injuries can be severe and sometimes fatal from infection, but they represent harassment and opportunistic wounding rather than true predation. A free-ranging adult rabbit in an open space has very little to fear from a rat in terms of direct physical attack.
Where adult rabbits are at risk is when they are sick, injured, or dying. Rats readily scavenge carcasses and will approach animals that are too weak to defend themselves. A rabbit with myxomatosis, for example, becomes lethargic and disoriented and may eventually be fed upon by rats before it has actually died. This blurs the line between predation and scavenging.
Scavenging Versus Predation
Rats are prolific scavengers, and much of what gets described as “rats eating rabbits” is actually rats consuming rabbits that are already dead. Roadkill, rabbits killed by other predators, and rabbits that died of disease are all fair game for a rat looking for calories. Rats have no squeamishness about carrion and will consume flesh, organs, and bone from carcasses many times their own size.
The distinction between scavenging and active killing matters because it changes the practical implications. If you keep domestic rabbits and find a partially eaten carcass, the rat may have killed a kit or gnawed on a trapped adult, but it may also have consumed a rabbit that died of other causes. Knowing the difference helps you figure out whether you have a predation problem or a disease and sanitation problem.
Signs that suggest active rat predation rather than scavenging include bite marks on surviving rabbits (especially on feet, tails, or ears), disturbance of nesting material, and the disappearance of very young kits with no carcass remaining. When a rat kills and eats a newborn kit, it often consumes the entire animal, leaving little evidence behind.
Protecting Domestic Rabbits
For people who keep rabbits outdoors, rats are a genuine concern, though the threat is more about kits than adults. The most effective protections are structural.
- Hardware cloth: Standard chicken wire has gaps large enough for a young rat to squeeze through. Hardware cloth with openings of half an inch or smaller keeps rats out while still allowing ventilation.
- Raised hutches: Elevating a hutch off the ground on legs makes it harder for rats to access, especially if the legs are fitted with cone-shaped baffles or coated in slippery material.
- Food management: Rats are drawn to rabbit enclosures primarily by the feed, not the rabbits themselves. Storing pellets in sealed metal containers and removing uneaten food each evening reduces the attraction dramatically.
- Nest box security: When a doe is nursing a litter, the nest box should be inside the hutch with no external access points. Some breeders add a second layer of fine mesh around the nest box as extra insurance during the first two weeks.
Poison and snap traps are sometimes used around rabbit housing, but both carry risks. Anticoagulant rodenticides can poison rabbits through secondary exposure if they nibble contaminated bait or contact a dying rat. Snap traps can injure curious rabbits if placed inside or immediately adjacent to their enclosures. If you use traps, place them inside bait stations that exclude animals larger than a rat, and position them along walls and rat runways rather than near the rabbits themselves.
Indirect Threats Rats Pose to Rabbits
Direct predation is only part of the problem when rats live near rabbits. The indirect threats are in some ways more significant for rabbit keepers.
Rats carry a long list of pathogens that can affect rabbits. Leptospirosis, spread through rat urine contaminating food or water, can cause serious illness. Rats also carry parasites including fleas, mites, and internal worms that can transfer to rabbits sharing the same space. Rat droppings in a rabbit’s food dish are a disease vector even if the rat never makes physical contact with the rabbit.
Stress is another underappreciated factor. Rabbits are prey animals with a strong threat-detection system, and the persistent presence of rats around their enclosure can cause chronic stress. Stressed rabbits eat less, breed poorly, and have weakened immune responses. A doe under stress may abandon or cannibalize her own litter, which can be mistakenly attributed to rat predation when the real culprit is the mother responding to perceived danger.
Feed competition is the most mundane but perhaps most costly issue. Rats are efficient at finding and consuming stored grain and pellets. A moderate rat infestation around a rabbitry can consume or contaminate a surprising volume of feed. Some estimates from pest control professionals suggest that a single rat can eat or spoil roughly 25 to 30 grams of food per day, and where there is one rat, there are usually many more.
Island Ecosystems and Invasive Rats
Some of the most dramatic examples of rats impacting rabbit-sized animals come from island ecosystems where rats have been introduced by humans. On remote islands, invasive rats have devastated populations of ground-nesting seabirds, reptiles, and small mammals precisely because those species evolved without mammalian predators and have no defensive behaviors against them.
Subantarctic Macquarie Island is a well-studied case where rats, rabbits, and feral cats were all introduced species that interacted in complex ways. Cats preyed on both rats and seabirds. When cats were removed to protect the seabirds, the rabbit population exploded because cats had been keeping it in check, and the unchecked rabbits then devastated the island’s vegetation. Rats, meanwhile, continued preying on seabird chicks. The case illustrates that the relationships between introduced predators and prey are rarely simple: removing one species can trigger unexpected cascading effects on others.
In these island contexts, rats are not specifically targeting rabbits as prey, since rabbits and rats on Macquarie Island were both invasive herbivore-omnivores in different size classes. But the broader lesson applies to the original question: rats are generalist feeders that exploit whatever vulnerable prey or food is available. On islands without native mammalian predators, that flexibility makes them devastating. In mainland environments with many competing predators, rats are a secondary threat to rabbits rather than a primary one.
How Rat and Rabbit Behavior Intersect at Night
Both rats and rabbits are crepuscular to nocturnal, meaning their peak activity overlaps in the hours around dusk and dawn. This timing is relevant because it means the two species encounter each other frequently in shared habitats. Wild rabbits emerge from their burrows to graze at twilight, which is also when rats begin their nightly foraging routes.
In rural and suburban settings, this overlap creates friction. A rabbit grazing near a hedgerow at dusk is unlikely to be attacked by a rat, but a nest of kits left behind in a shallow scrape while the mother grazes is exposed during exactly the hours when rats are most active. The mother’s strategy of nursing briefly and then leaving the nest relies on the assumption that the nest’s concealment will hold. Against a scent-driven, ground-level forager like a rat, concealment is less effective than it is against a visually oriented predator like a hawk.
For domestic rabbit keepers, this shared schedule means that the hours after dusk and before dawn are the highest-risk period. Securing hutches and nest boxes before nightfall, and removing spilled food that would attract rats overnight, addresses the most vulnerable window.
How This Compares to Other Small Predators
Rats are far from the most dangerous predator a rabbit faces. Stoats and weasels are specialist small-mammal hunters that can enter rabbit burrows and kill adult rabbits many times their own weight. Foxes, domestic cats, and birds of prey are all more efficient rabbit predators than rats. Even domestic dogs account for significant rabbit mortality in suburban areas.
Where rats stand out is not in their killing ability but in their ubiquity. Rats live everywhere humans do, in vastly greater numbers than stoats or foxes. A rural property might have one fox in the area but dozens or hundreds of rats. The per-rat risk to rabbits is low, but the cumulative exposure can be high simply because rats are so numerous and so persistent. They also exploit confinement in a way that wild predators often do not. A fox may circle a hutch and fail to get in. A rat can squeeze through a gap the width of a quarter, gnaw through wood, and work at an entry point over successive nights until it gains access.
This persistence is why rabbit breeders in many parts of the world consider rats a routine management concern rather than a dramatic predation threat. The rat is not the wolf at the door. It is the slow, constant pressure that costs kits, contaminates feed, and spreads disease when left unchecked.