Thanks for all the info guys. I just got back from the vet. He has contacted Heartguard again, they do require a second test which will be performed in the morning. If it shows positive, heartguard will pick up the tab. That's good but money was never the concern in the first place. Vet says first s...

The vet has contacted heartguard for me. I have proof that he has been on heartguard. He thinks they will pay. The down time of 3 to 6 months concerns me though. Vet said at the most 2 months?

I ran into a little problem at the vet yesterday. My 3yr old choc. has been on heartguard his whole life. His heartworm test came back positive yesterday. What the hay??? Vet advised the vaccination (2 shots) or something like that. Has anybody else had this problem? Is the vaccination the way to go...