I've searched and searched and can't find an answer one way or the other, so hopefully you have one. I have 10 chickens and 3 Khaki ducks in the same coop. I know at least one chicken has worms, so I got some Wazine 17. If the chickens have worms, I assume the ducks could have them? Should I treat them also with Wazine? I will be following up with some Ivermectin, is this safe for them also? In case it matters, I'll be using the pour on Ivermectin. Thanks!