Hen rattling when breathing

[wjmiller]

I have a 2 &1/2yr old light brahma who was wheezing we thought upper respitory infection eyes and nose are clear we gave 5 days of 1cc tylan 50 injection now she is coughing & rattling when she breathes she sounds aweful she doesnt have much appetite but it is very hot in ga. A month ago she was attacked by a dog we gave her penecilin and all her wounds healed and now this im very worried what else can i do please help thanks