My dog has real bad fleas and i think he gets them from the back yard!!?

It's really hard to get fleas under control unless everyone around you does as well. One thing you can do is put your dog on the heartworm with flea control. You have to make sure you treat your home constantly for fleas as well by vacuuming daily especially where the dog sleeps. I flea comb my dog every day as well because she has a flea allergy and even one flea sends her into itching fits. OTC flea treatments don't usually work and some have actually been harmful to the dog. To much can also be bad so you have to really work at it when the fleas are at their worst. Last year we had a really bad problem with them and we had always been able to use rotations of frontline and advantage but it didn't work for more than a week. We used capstar and it killed them instantly and kept them off along with the other things we also did I mentioned above. Also watch for tapeworms when fleas are at their worst. In warmers areas it can be a constant battle so work with your vet on how to best handle them and what treatments to use that are safest to your dog.