Something I want to make sure people understand, worms are extremely easy for birds to catch as well as so many other things. You can do so many things right, and sometimes no matter your effort, a bird still comes down with something. So I'm the guy with a nice sized flock, but have a few roosters set aside from my flock that are more pets than anything... mid summer my rooster "Denden" took sick, anyone that knows me knew this bird was as close of a pet as any dog or cat, so I was fast to react and treat him with the standard meds. He showed no sign of improvement, Denden took "colds" durning wet weather fairly easy... his feathers were never water resistant like his brothers, so when he got wet... if i didnt go the extra mile and dry him... the following day he'd be croopy. Despite keeping a close eye on him, he took very ill, and as time went on his face became pale often and his feathers around his neck had been dug off in different places. He had no exterior mites because I kept him treated, his nutrition was great because he was free range. I had read on here that someone had a similar issue with their bird and despite all efforts their rooster died... it was said that the likely cause was worms. So the next day while I was outside, Denden was standing next to me and in his droppings were small worms. I began treatment with Wazine right away because this is what I was sold to fix the issue... Denden showed some improvement, but he started declining in health about 10 days later and passed away in my arms over a month later. So as horrible as this was, now his brother has the same symptoms... this made me sick. I called vets for live stock all over and no one looks at Chickens... the closest vet was over 2 hours away, so I grabbed up my rooster and took a road trip to this vet for some possible help. Turns out he has GAPE WORM... listen, wazine is not for gape, he said that it's very likely I could have saved Denden had I known this. So listen, there are multiple worm medicines out that do not fight gape worms, if your bird comes down with this MAKE SURE you know what types of worms the deworming medicine you have kills. I seriously hope this helps, because if one bird has it... chances are the others already have it to some degree as well. If you don't get it treated correctly fast, its all too easy for things to get out of control fast.