For a few days I've noticed my Americana rooster acting strange, he'll stay on the perches all day and, sometimes, will walk up and down them, doing nothing :/. He's had a frostbitten comb for a while, but it wasn't too bad till this morning(a cold front came in last night and froze everything) it's now all black. I brought him inside and put neousbouren On it and gave him an apple, which he ate almost all of. He also got scared while I was bringing him in, and his stool was a greenish puddle. When I put him back in his coop, he was pretty active and obviously happy to see his hens again Any advice would be helpful.