How important are heartworm meds? Is it a serious possibility for the dog, or more of a marketing thing for the drug company? And is there a cheaper way to get these meds than the vet's office? I'm not a careless pet owner -- just really having trouble stretching our money lately. Our Lab has always had all his meds including squeeze-on flea stuff, but the new GSD as far as I know has had nothing - rabies shot, heartworm meds, even license - so we have to take care of it all. And it kind of ticks me off that we have to take him to the vet, pay for a heartworm test, buy the heartworm meds *through* the vet. With our Lab I tried the Petmeds online shop, but they won't sell without a vet's okay, and I can't find a vet that will approve the order. Thanks for the info. I want to do the right thing, of course, but money's tight. I've never had a dog before, always been a cat lady! And our cats stay inside so they don't need much.