The mother cat at home has just given birth to kittens for three or four days. Five kittens were killed by other cats. Why?

This situation may be caused by the following reasons:

1. The mother cat doesn't have enough experience or skills to take care of the kitten. This may be her first delivery.

The mother cat may have health problems, which prevents her from providing adequate care and protection.

3. The environment is unsafe, and there may be threats from other animals or the outside world, which may cause the kitten to be hurt.

Kittens may have congenital problems, which makes them more vulnerable to injury or illness.

To prevent this from happening again, you can take the following measures:

1. Give the mother cat enough quiet and private space to take care of the kitten safely.

2. Make sure that the female cat has enough nutrition and water to keep healthy and physical strength.

3. Take the female cat to the vet for health check-up regularly to ensure that it has no potential health problems.

4. Set a safe environment at home, away from other animals or potential threats.

If you find any abnormality or health problems in the kitten, take it to the veterinarian for examination and treatment immediately.