I just received this rooster from Florida. He is a Blue Jersey Giant. First of all, he came from Florida to Iowa, which now I feel bad for it's so darn cold here. Since I noticed a couple things when I got him, I have asked this vet about them, had me treat the bird with a couple different things just in case a few months ago (which is when I got him), seems better but still shakes a lot. He seems normal, eating good, drinking, poop looks normal, I just can't figure out if this bird is really cold or something could be wrong. Do chickens shake like this when cold?? Maybe this breed can't adjust to cold?? I'm trying to fine out. I just don't know what to do. I have a heat lamp and he seems to really like it. Thank you.