Can chicks be wormed with Ivermectin? I am going to do my entire flock soon. My question is this: Recently I acquired some blue and black cochin chicks between the ages of 3 - 4 weeks of age. They are a little older now. But a few of them are smaller and much lighter than the others. I separated the lighter ones so they are not competing for food and water [though I didn't really think they were in the first place]. Is it safe to worm chicks this young? Thanks.