My little dog has been on Frontline for fleas and Heartguard for Heartworms. I understand that there are medications that last for more than one month - like 6 months. Does my little mutt has to remain on Frontline and Heartguard or can I switch without doing harm? Thank you.
Pro-heart 6 is an injectable form of heatworm medication that lasts 6 mo. Ask your vet if they carry it. vetcare