Hi BYC friends! I'm new here and in desperate need of advice. I have a total of 38 chickens in various coops. My largest flock (9 hens and 1 roo) has worms. I orally treated everyone in that flock with Ivermectin because I wanted to make sure everyone got an accurate dose. I treated two weeks ago and this morning I found droppings that look like coffee grounds wiggling with worms again!!! My other flock groups do not seem to have worms and they are on a rotation schedule for free ranging so they are never all together at the same time. Does the type of worms my chickens have dictate the kind of treatment? How do I determine what kind of worms they have? Should I use Ivermectin again or something else? Should I be treating ALL my chickens? I've read about giving probiotics and yogurt and other treatments but that's not really practical since I have so many. Believe me, it was an ordeal orally dosing 10 chickens! Any advice is greatly appreciated. Thanks in advance.