If you have a cat door, you’ll need to face the question on whether to leave the cat door open at night or not. If you leave the cat door open, then your cat can come and go at night, but so can other critters such as raccoons or skunks.
That’s why experts suggest you keep the cat door closed at night. Not only will this keep other animals out but it will keep your cat safe inside at night when predators such as coyotes or dogs could attack your cat. Your cat might not like being cooped up at night, but safety can be more important than your cat’s feelings.