1. If all pills have been administered on schedule, prescriptions can only be refilled only if your pet has had a veterinary physical examination within the past year.
2. The American Heartworm Society recommends year-round heartworm prevention, as does ZumVet.
3. It is recommended that dogs on year-round heartworm prevention be tested annually for the presence of heartworm larvae or antibodies, even if no doses have been skipped. This is to check for preventative-resistant heartworms
4. ZumVet has the right to reject your prescription request and/or recommend a video call/heartworm test on medical grounds, if the veterinarian sees the need to do so.