If a family member or friend already has animals in their home, use that as a real life opportunity to demonstrate proper pet care -- including leaving the cat alone when it's 'napping' (exaggerating again by hushing and tiptoeing around). Always praise your child for his or her appropriate behavior around the animal, and when there's an incident where the cat hisses or the puppy dogs growls, explain why that happened. ("It hurts Fluffy when you pull her tail, and she's telling you to be gentle and not to hurt her.") Again, use every incident as a teaching opportunity and keep your reactions as calm and matter-of-fact as possible. This will reassure both the animal and your child.