Our dog was tested for Heartworm in March and has been on Heartgard ever since. We don't usually keep our dog on Heartgard year-round. Generally we start him in the Spring and end him in the Fall. I can't recall if we still give it to him in November?? Does it depend on the weather? When should we stop it - or is it better to keep him on it year round?
It is now recommended that your pet be on heartguard all year. My personal opinion is if you live up north and there are no misquitos in the winter then discontinue through the winter (Dec-Mar). Thanks, vetcare