So it's been really cold recently and last night as I was closing the coop door and I noticed my roster's wattles were really swollen, so I looked it up and thought it could be frostbite but I wasn't sure. And so today I went out to check on him so I put food in my hand to feed him and he started to eat it, which he Never does, and I noticed how his mouth was just open like he wouldn't close it. I was wondering if he just has frostbite or something else, and how to treat it.