Also, responsible for taking money in the form of cash, check, or credit card from patrons in exchange for food or services. (livecareer.com)
Anything and everything the puppy can put in his mouth should be exchanged for food rewards and attention. (smartypup.com)
They first trained the dogs to touch three different tokens in exchange for food: If the dog touched one token, it got the reward. (animals.howstuffworks.com)