Hello all, I'm a first time chicken owner who is very worried about her birds! I have 12 chickens who are almost 11 weeks old now, all larger breeds. All seemed fine until a week after they moved out into their coop. I have tried vetrx and it doesn't seem to be doing too much. Will post a picture in case I may be wrong about the diagnosis but after researching it looks like Mycoplasma Gallisepticum? I noticed one having a puffy like eye and got worried tried the vet rx and it seemed to have gone, except now a different bird has it. All seem to be eating and drinking normally, and not lethargic. I haven't noticed any bubbling of the eye or anything like that however some sneezing here and there. I have also tried saline just in case it would help as that's all I had on hand when I noticed the issue. I have seen that tylan 50 is recommended? I can get it at Tractor supply elanco tylan 50 injection. Is this the right plan of action and if so is it effective to give them orally and how much??