Tri-Heart Plus is proven protection for dogs. Identical heartworm protection in every way, except cost! Tri-HeartŪ Plus offers the same proven prevention as HeartgardŪ Plus but at a LOWER PRICE! Dogs of any age, even older dogs, can become infected with heartworms, roundworms or hookworms - but it's easy to protect your dog! Tri-HeartŪ Plus flavored chewable tablets contain ivermectin/pyrantel - a proven combination to protect your dog and ensure your complete peace of mind. Tri-HeartŪ Plus is an affordable prescription and all it takes to prevent parasitic infestations that can literally rob your pets' vitality and shorten their lifespans. Tri-HeartŪ Plus is available in 3 dosage strengths with easy to recognize color-coded packages. Click below to go to Tri-Heart Plus web page and download your rebate coupon.