My bantam cochin has been sick (seems the cooler weather has contributed) - I've had them all on duramycin for a week, then off for a couple days then back on for 14-15 days. Stopped for a week. Noticed she just looked really bad this evening and picked her up and she's very thin. I brought her in, she's breathing really heavy, one in a while thru her mouth, and sneezing (I think) some. The duramycin isn't really cutting it. Is tylan my next option? I'm going to buy rooster booster wormer (read up on that and it looks like one I want to try, not sure if we have worms or not) to worm everyone. Worried about how thin she is and this breathing. (ps - my other bantam cochin died from mareks, I'm sure, about 6-7 weeks ago - she went to the vet and no worms were found, no cocci either). I think I should worm just in case. I have extra vitamin b in the water b/c I have another one with mareks. ughhhhh...I have them together, I hope this is ok, it almost seems to be doing the mareks silkie a little good to have company. I'm really, really bummed with all of these problems I've had with my chickens. I'll put duramycin back in water until I know what to do.