I gave my friends new birds a 1/2 cc. shot of Tylan 200 yesterday. One was sneezing and some of the other hens we got together were found to have CRD..I gave it to them in the thigh and now one is limping..I'm so scared, what do I do now? I read that you wait and give another shot 48 hrs. later and you give it to them in the breast!! Yikes!!! HELP? okay..maybe this would be more helpful...they are 5 months old ( 3 of them). They are in a tractor and are eating and drinking well..One is just holding her foot up and limping on it. I think it's the side I gave her an injection on..Could it just be from that? CORRECTION...............1/2 ML..