I'm sure many remember Blitz was heartworm positive when I got him. He has a very heavy load of heartworms. We chose the slower form of treatment since my vet was concerned he may not survive the traditional treatment of injections. He received a pulsed Doxycycline treatment + heartguard for 9 months. He finally tested negative for heartworms yesterday . Even my vet was surprised he cleared up so quickly. No kennel rest was ever required. He has shown so much improvement over the last couple months I'm sure do to the decline of heartworms. Blitz used to struggle to run and play. Now he runs like the wind without any problems. He has also finally started to get a soft beautiful coat in, his chest no longer appears disproportional to his body and he is overall a very happy playful dog. Total cost of treatment (including heartguard, testing, vet visits & antibiotics) $160. The traditional injections would have costs us $600 - $700!