So I went out to feed the chickens this morning and found my favorite (Miss Mable) acting a bit weird. She was just sitting there with her eyes closed while not really moving around much. She is still eating some and drinking a little but she just isn't her normal self of walking around and keeping track of the others. She doesn't have any other symptoms of anything really but it has me concerned. I went to the feed store and they gave me some Tetroxy HCA-280. (Net weight:280g) I'm having a hard time understanding the mixing instructions on the back but maybe someone here has used this before and could tell me how I should mix it and/or if I should even use it at all. I hate to use it and then kill off all of the chickens with a dose too high, but if it will work, I want to mix enough to help her get better. Any suggestions? I've been trying to keep the brood clean every day and make sure they have enough food and fresh water. The rest of the chickens seem to be just fine and acting normal. I'm hoping that I don't get out there tomorrow morning and find her laying there, but I don't want to make a mistake with the dosage. Please help if you can. This is my first group of chickens and so far it has been a very rewarding experience. I just hate to lose any of them. Thanks for your replies.