ivermectin, same medicine they use for horses. use 1/10 of a ML per 10 lbs of body weight. treats fleas ticks ringworms and heartworms. Cost about 38.00 a bottle and will treat about 10 dogs for 5 months. It's the same medicine that's in frontline
It's called Ivomec and you give it orally. You need a needle to get it out of the bottle however. Any feed store that has horse medicine should have it. Just make sure you weigh the dogs first and get the dosage right. 1/10 of a ML/CC per 10 lbs.