I adopted a rescue dog from the south. They said he was treated for heart worm.When I took him back for his yearly exam, he tested positive for heart worm.
I was told this test can come back negative if in the incubation period. It may be a good idea to test again in 6 months from the time you rescue your pet. Who was to know. I am very diligent in following up on my pets health.
Thank goodness I have PetPlan. The staff was very caring and wonderful.