Peanut butter - it's not just for chocolate anymore!
Or jelly. For years we've used peanut butter as a training tool with greyhound fosters and our adopted greyhounds. Peanut butter is a safe people food (in moderation) for positive reinforcement with the greyhounds.
Bandit the puppy is very strong willed and it took time, patience, ice and peanut butter to train him to come in the house when we called rather than when he was in the mood.
Peanut butter is the best flavor for medicine!