Ok so I have a full grown Polish that just showed up. It wasnt with my flock but rather in my yard walking around. It is either a young roo or a hen. HA HA good odds huh. Anyhow that is not the question at this moment. My kids and I rounded it up and I put it in a cat carrier for now. All my cages are full and I didnt want it to mingle with the other peeps. I will take pictures in the daylight. Anyhow it is thin I can feel its breast bone ALOT!! It also seems to have runny poo and ate a little but not much. I guess after the trama of being chased and put in a cat carrier it may not be hungry or may be sick. I have got chickens before but this one just with weight and runny stool I want to know what to do before putting it anywhere near everyone else. I did a quick inspection did not see any mites and poo did not have worms or atleast any full grown wiggily ones in it! Where should I start. Oh and it seems like the poo smells bad but then again it could be cause she is in a cat carrier and well its a bit to small. I have a package of Tetracycline hydrochloride that I have on hand for any issues with the flock or when I do usually get a newbie. Thing is the newbies dont normally seem to have issues this one does. I dont want to start light and then have to keep trying something else and something else. Where should I start I have my layers and the kids showgirls and the one curly roo also the 22 5 1/2 week old chicks I really want to go with the side of caution what should I do? Can I give it shots of Penn? Thanks