This is from my Anatolian breeder:
"Once the puppy has reached 50 lb of body weight, you can use 1% liquid ivermectin at a rate of 0.01ml per 10 lb of body weight (that's 0.1ml per 100 lb adult) during cooler months (Oct thru April). During the hotter months (May thru Sept), you should increase it to 0.1ml per 10 lb of body weight (1ml for a 100+ lb adult) -- 1ml is the maximum amount you should ever give. This safe and very cost effective product will prevent heartworms and kill most other intestinal worms, except for tapeworms. You can get liquid ivermectin at most Feed & Seed Stores or Tractor Supply outlets."
"Once the puppy has reached 50 lb of body weight, you can use 1% liquid ivermectin at a rate of 0.01ml per 10 lb of body weight (that's 0.1ml per 100 lb adult) during cooler months (Oct thru April). During the hotter months (May thru Sept), you should increase it to 0.1ml per 10 lb of body weight (1ml for a 100+ lb adult) -- 1ml is the maximum amount you should ever give. This safe and very cost effective product will prevent heartworms and kill most other intestinal worms, except for tapeworms. You can get liquid ivermectin at most Feed & Seed Stores or Tractor Supply outlets."