I have a rooster about 4 yrs old, the other day i noticed he was walking "like a drunk" i checked on him later he seemed like he has doing better so i left him, later that night i checked the coop and he wasn't on the perch he was laying on the ground. my son was sick yesterday and i forgot to check him. today my daughter came in and said he would not get up when he did it would be like 2 steps then he would fall over his mouth is also open and she says he feels hot. we set him up in a portable cage in the living room and he did like a somersault in the cage and couldn't get back up. I think he did this once before a few yrs back also and i posted that time to and got no responses. and after about a week he was fine but i can not remember what i did last time for him either.does anyone have any advice , know what this is or what i should do?