Our dog has been on Heartgard since she was a puppy (we live in Wisconsin and she's just turning 3) and I'd like to put her on Heartgard again but am wondering...is it really necessary to have her examined by a vet before starting the treatment again? I assumed the Heartgard was 100% effective in preventing the disease then why would she need a heartworm test? I would just like to get the medicine and forego anything that is unnecessary...what do you recommend? Thank you.
If you discontinued the heatworm preventative then she could of contracted heartworm during that time period. This is why your vet requires the test. vetcare