why do cats and dogs not like each other? Some do and some don't? Why?
It's just their nature. I trained my dogs to tolerate a cat in the home, but even then, there still would be a fight every now and then.
It's like racism, but for animals.
Different breeds of cats and dogs have varying personalities. This explains why some cats and dogs get along with each other and others don't. The Japanese Chin is an example of a dog breed that is very cat-friendly.