We just bought a new Silkie from a chicken show. Beautiful bird about 3 months old. But when we got the chicken home it just sits on the ground. It doesnt stand up or walk around. She flaps her wings vigorously and is pretty strong when she is first handled but then calms down and isnt very active. Last night she looked like she was breathing fast. Today I don't think so. She has not pooped since we got her.I checked her vent and externally it is clean. She has not been drinking much although we did get her to drink a little this am. She has not eaten. She still isnt standing. Since she was breathing fast last night I did start her on tetracycline but I am not sure she is getting enough since she is not drinking much. She is isolated from the other chickens while I hope she gets better. Any ideas on what could be wrong? Treatment? Thanks for all of your help.