His comb is cold & it's a cool night. I have him in a sheltered coop. Has anyone ever heard of a problem that causes the symptom of a chicken holding its wings out to the side (other than because of being overheated)? He is sick with either coryza or mycoplasma right now. I treated all my birds a few weeks ago for this with Gallimycin & Terramycin. He was showing no symptoms at that time. I started treating with Tylan 50 injectible plus Duramycin in water 3 days ago (2 days after he began gurgling in his breathing). I gave .6 cc injection in breast 1 day, .8 in breast on day 2, & 1 cc in back of neck last night. Today he has been reluctant to move & hasn't eaten all day (other than a little grits-garlic-&-oatmeal I force-fed him tonight, along with a few drops of Poultry Nutri-Drench). I'm afraid I gave too much Tylan at once in neck &/or I hit something significant in his neck rather than just injecting subcutaneously. I injected a little less than halfway up the back of his neck. However, I gave the same 1 cc dose to a hen a couple days earlier & she was fine. Another hen who's been very sick was sluggish for half a day after a .3 cc back-of-neck injection (& I followed up the next day with a .7 cc injection in same area). He's not panting & I've only heard a little gurgling a very few times. I haven't dared to give him any Tylan tonight. I love this rooster & don't want him to be suffering. Help??