The veterinarians around these parts (Florida) are pushing Heartworm and Flea & Tick meds that seem mighty costly to me, especially the flea and tick stuff. Ivermectin is in the heartworm meds, and afoxolaner in the flea and tick stuff. What do the old school pros do to beat the cost? I'm kinda new to dog care, and didn't own one for fifty years. My best buddy is a Mastiff-Anatolian mix that is a real sweetheart.