I wanted to worm my chickens because even though I haven't seen any wierd poo or anything it's been a year and I figured it wouldn't hurt. (Egg production has also gone down.) So i go to TSC and they say to use Terramycin and sell me 2- 6.4oz packages. They said to put I pack in my 5 Gal. waterer and 2 days later put the other one in. I have 35 chickens. Now that I've read the package....None of this seems right! And I don't even know if I would be able to figure out the dosage. I really stink at math and I feel like I need a Degree in Pharmacuticals and equipment to get this right. If anyone can give me any advice I would really appreciate it.