Here are some reasons why a rabbit may be sleeping a lot and bleeding from the back door:
* Trauma: If your rabbit has been injured, they may be sleeping more in order to conserve energy. Bleeding from the rectum can also be a sign of internal bleeding, which can be caused by trauma.
* Stress: Rabbits can become stressed for a variety of reasons, such as changes in their environment, new predators, or even just being handled too much. Stress can lead to decreased activity levels and an increased risk of disease.
* Diet: A diet that is high in sugar or carbohydrates can lead to weight gain and obesity, which can put pressure on the spine and cause pain. Bleeding from the rectum can also be a sign of intestinal inflammation, which can be caused by a diet that is too high in fiber.
* Genetics: Some rabbits are simply more prone to developing certain diseases, such as spinal problems or intestinal bleeding. If your rabbit has a family history of these conditions, they may be more likely to develop them themselves.
If you notice that your rabbit is sleeping a lot and bleeding from the back door, it's important to take them to the vet as soon as possible. The vet will be able to determine the cause of the problem and recommend the best course of treatment.