In order to fill prescription medications, there must be a current (within 1 year) working client-patient-doctor relationship. If we have not seen the pet, an office visit will be necessary to establish this working relationship and then the mediation can be filled. PetLife cannot legally fill a prescription without seeing your particular pet. Please call your veterinarian several days prior to having a medication run out so that a refill can be filled in a timely manner. If you come to PetLife to refill your heartworm medication, you must show us a negative heartworm test that has been performed locally, within one year’s time. If this is not available, PetLife can arrange for a Veterinarian to exam your pet, and perform a heartworm test here in our office.