According to the Student Survival Guide from last year (the one that V'10 wrote for V'11), "discounted veterinary care is offered at the Foster Hospital for Small Animals. Office visits and registration are free, and treatments, medications, and food are all 40% off the usual rate."
In addition, "Hills offers free dog and cat food to vet students; all you have to do is fill out a short survey about the domestic animals that you own and the pet food that you use. In this program you receive two bags of food each month (canned food is available as well). Hill's also offers heavily discounted Hill's Science Diet and Prescription Diet from the Foster Hospital for Small Animals. The cost to you is 60% off the retail price, plus sales tax. You must have your pet registered with the hospital to order. Iams offers free dog and cat food through the "Food for Thought" program. Each month you will be notified of an educational article on Iams's website, accompanied by a quick and easy quiz. Your reward for completing the quiz is one free bag of dry dog or cat food, or one case of canned food."