Cost to treat a dog for heartworms ranges from $400.00 to $1,000.00
Treating a dog for heartworms involves giving the dog injections and in some cases the dog will need to stay over at the vets for awhile while being treated for the heartworms.
You can give your dog heartworm medicine before they get heartworm which will prevent the heartworm from ever getting to your dog but once the dog has heartworms the best treatment is to take the dog to the vet to get injections and a possible vet stay.
The dog will usually live it's normal lifespan after the injections but if the heartworms have progressed too far then the dog may not be able to be saved.
Usually heartworm treatment from a vet is pretty successful.