I am not sure what else we can do. This is our first time with any poultry and we have chickens, turkeys and ducks. Our next to smallest turkey has been sick for over a week. We lost our smallest turkey probably 2 months ago from something respiratory (we think). There were no signs of blackhead. The little one went within a few days of showing symptoms- we tried ACV and cayenne pepper but they had no effect. She was separated from the others once she started showing symptoms and it was about 2 months ago. The second smallest started showing symptoms about a week ago so i don't think its the same thing. This turkey does have the yellow diarrhea of blackhead. She started with the depressed attitude and decreased appetite. The week before we had a duck that was a sickness that started the same way and was a respiratory illness that we treated with tetracycline hydrochloride with success. We tried it on the turkey (before yellow poop started) but she kept dumping the water out and wouldn't drink. I haven't found any indication on how to administer it without dissolving in a gallon of water. She did get some of it. We were also using cayenne in the food and she was eating just not much. We weren't sure if the first yellow poop was from the tetracycline or illness but we went and got Api Cure All which was the only way we could find Metronidazole immediately. We've been able to give her most of the 2 doses (250mg each) a day for 2 days. I know she needs more ans we are giving it to her, but she is really struggling. We've debated putting her out of her misery but she has been fighting so hard. In the mornings she is better she can eat and drink some but by the afternoon she seems to have trouble swallowing or something. She starts gagging and having trouble breathing when she tries to eat and drink. Same happens when we give the meds- in the morning I can shoot into her mouth and it seems to go down well but in the after noon she gags and gasps. She is more active in the morning, by the afternoon she isn't moving at all, but she is still standing with her wings drooping. She looks so bad. i don't really want her to suffer anymore but neither my husband or me has the heart to put her down when she seems to be fighting this so hard. I am still putting cayenne in her water and food. And we have been giving her meal worms because she loves them. We have already decided if she makes it through this we will let her die of natural causes at this point she really has become more of a pet than food. We've pretty much decided we are done with turkeys though. We really like them but they are too fragile or we just suck. What else can we do for her?