i have a Cuckoo Maran that has a serious eye problem. I have been treating her with Terramycin for the eyes and just dose not seem to be getting better. She now has yellow stuff around her nostril on that side of her face. She is with a silkie who's eye is not as bad but is also closing her eye and have been treating her also. They also are receiving medicated crumbles mixed in with starter crumbles. they are about 16 weeks old and not laying. I bought some Terramycin Soluble powder today. Was going to start using that in their water but can not figure out how much to put in two gallons of water. Every day i can get a bout a clump of white stuf out of her eye and then i put in medication. can some one help me with this. She is not herself and this has been going on for a while. she is raspy sounding also. other chickens she was with some are coughing was going to treat all with water soluble antiboitic