Trips to the vet aren’t at the top of anyone’s list of fun activities, and they probably aren’t on your pet’s list, either. But they should be on your to-do list, whether you’ve just adopted a kitten or you’ve got a loveable senior pup who’s been everything from your bedside nurse to your errand buddy. And unless your pet is there for an annual checkup, you’ll probably walk out with a pet prescription and detailed instructions on how to administer it.