You are no doubt thinking of witches that like to use these animals as familiars. They are inherently not evil, but any creature or human can do evil things. If animals are subjugated by evil spirits to do evil, Then they are evil by their actions. Do you have familiars Aleu?
God created every animal -- in the water, air and land. He's given us dominion over all of them. What we Do with them Can be dangerous. Some animals aren't meant to be pets. Best to leave them in their natural surroundings. Some people have been known to have wild animals as pets in their homes. At some point the animal 'turns' on the person --snakes for instance -- and kill the person. A family had a huge snake that they let out in their living room. It was apparently a pet. They had a small child and it did it's 'natural' thing and wrapped itself around the child and killed it.
People tend to equate black cats with witches. Or bad luck.
How would a person form a spiritual bond with an animal. Maybe it's best to not respond to that because Bendito says it's highly dangerous.