Vegetarian Dog Treats

Okay so my friend has this CHH he adopted a few years back. The dog was discovered to have heartworm, and since the vet said that an operation would be risky, medication was given instead. Now the dog does not require any medication anymore, or any check ups and such. And the he says that the dog is healthy and fine.

-Can heartworm be completely treated by just the medicine?
-Do I need to bring it for check-ups in the future?
-Are there anything important I need to look out for?
-Chi Hua Hua
How is Heartworm Treated?
In dogs, most cases of heartworm disease can be successfully treated with a drug called an adulticide that is injected into the muscle.

(Heartworms can be treated)