The Friendly Neighborhood Witch Mod
Join Date: Dec 2014
My concern with skipping months over the winter or waiting a full 45 days in between doses is this... what if there are some worms that “breakthrough”, and are not killed off by the previous month’s treatment? If this happens in say, October, and the dog does not get preventative again until March or April, what then? When you wait a full 45 days in between doses, you have very little room for error if you do happen to forget. I discussed the pros and cons with my vet, and we settled on dosing every 37-40 days. I used to stop over the coldest parts of winter, but no longer do. Just personal preference on my part, but I’d feel terrible if my dogs had to suffer through treatment for something that is completely preventable.
That said, when my senior was still with me, I DID stop preventatives for 3 to 4 months over the winter with her. She had other health issues, and I felt reducing chemicals for her had more benefits than the possible risk of contracting heartworm in the dead of winter. My vet agreed with this choice.
Train the dog in front of you.