I can't say I've ever offered peanut butter to my cats. What is funny about cats is how sometimes they will have a favorite people food, like Nakita and her French Fries. When I was a growing up, we had a cat named Misty. Her favorite thing was saltine crackers. She would come running from anywhere as soon as she heard someone opening the bag of crackers. Growing up in a house with 3 kids, that cat had plenty of begging opportunites, but she went simply nuts for saltines, and ignored almost anything else we ate!