Rabbits who have not been spayed or neutered can produce offspring once they are sexually mature. If your female rabbit was with a male rabbit and they are both over the age of 3.5 months, you should monitor your rabbit for signs of pregnancy. The most obvious sign is when a female rabbit’s belly getting larger as her babies grow inside throughout the pregnancy. Besides the weight gain, pregnant rabbits will start to eat more, and most will also be extra moody. But it might be hard to tell if it’s pregnant based solely on a mood swing if your rabbit is usually unfriendly.
The most certain way to check your rabbit is to palpate her stomach. After 10-12 days post-breeding the baby bunnies will be big enough, you’ll be able to feel multiple marble-sized bumps inside the rabbit’s belly. They will continue to grow for another couple of weeks until the rabbit gives birth about a month after breeding. If a pregnant rabbit still has not given birth after 35 days, contact a veterinarian as soon as possible to either induce labor or perform surgery to remove the babies.
About a week before giving birth, the pregnant rabbit will start to pile up bedding or digging into a corner of the enclosure. This behaviour is called nesting and usually a rabbit will take hay or small items, or push blankets or loose bedding together to make a comfortable space to give birth. A nesting rabbit may also pull its fur out to line the nest, which can be shocking to owners who don’t know to expect this. When this happens, expect the babies within the next day or two. Most rabbits give birth at night, so be prepared to wake up to a litter of rabbits.