I have a 3yr old Barred Rock hen that has been acting weird for about a week. She just sits down and rests for hours at a time. This is not her normal behavior. She is still laying eggs and I noticed this am she laid her egg on the floor of the coop when she normally lays them in her box. I've also noticed her bowel movements are really watery and she has almost no more feathers on her back side. The feather thing though, has been all summer. But I've also noticed that her skin on her backside is red. Do all these symptoms point at end of life or is something going on that can be fixed? Any advice or suggestions would be greatly appreciated. thanks in advance.