Join Date: Nov 2017
Submit Photo: 107
Photo Submissions 27 Times in 27 Posts
I’m kind of surprised that moving from one humid climate to another you’d have such different advice. Of course the environments are completely different, but there’s plenty of mosquito activity in both regions. Maybe there is a big difference in the number of confirmed cases.
My Havanese did horribly on Heartgard. If your vet strongly recommends preventatives, I would specifically ask about the different options and doses. Heartgard caused a cycle of diarrhea that led to anal gland issues and all kinds of problems and it started over every month. I opted for blood tests instead since our climate is relatively dry. I have since learned there are other heartworm preventatives that would be better options if we decide we need one again, and that we can use a smaller dose. There was a thread that mentioned it here on the forum but I’m having trouble getting it to come up with the search, too, I think because it’s mentioned deep within in a long thread. I don’t really know if it’s the fake chicken flavoring or other ingredients in the chew or the actual drug that caused the problem, so I’ll stick to a straight pill and I won’t use a combination dewormer like Heartgard plus. If we have to use heart worm meds in the future I will also do the invermectin testing, just to be safe. I think it’s unlikely my Havanese has the mutation because my understanding is the reaction would have been much more serious, but there is no question he had a problem with what he took so I wouldn’t want to take any chances. Unfortunately there isn’t a lot of information out there about this, especially regarding Havanese specifically, so it took almost a year for us to confirm. I suspected it earlier and mentioned it to a vet and was immediately dismissed, which I’m still kind of bitter about.