He never did like it when I put it in a Kong toy, but he loves carrots. So I dipped the carrot into some peanut butter and ate one and he was anxious to have one too. Then he sniffed and was hesitate and then wouldn't eat the carrot. He saw I was also eating peanut butter on a cracker, but he didn't go for that either. Could it be the brand he doesn't like~?