I brought tylan 50 because everyone said its good for respiratory infections in chickens, but I didn't know it had to be injected. I don't have any needles and I don't feel comfortable injecting it myself anyways. Can I put it in their water dish? I have one hen that's been sick for over a month with a rattle and sneezing, she hasn't gotten any worse but she hasn't gotten any better either. I have been putting vetrx in their water to see if it would help but she's still sick. She has no discharge that I can see from her eyes or nose. But my other chickens are sneezing here and there and one other one seems to have the rattle. So I want to treat it asap. I have 3 silkies and 4 brown hens i think could be sexlinks. How long to treat for? and how much do I put in their water dish if they all use the same one? Any help is appreciated!.