I have a young RIR... looks like he's a roo, who for the past 3 days or so has been hiding out of the way and staying sat down. He otherwise seems healthy... face and waddles seem healthy ... eats when I pick him up and bring him to the feeder, drinks looks around and seems fine. But when he tries to walk, it's like his legs are extremely weak he can KIND OF walk... but is lucky to go one foot before sitting back down. He has gotten around somehow becuase he's been in a few different spots (within 5 foot from one another) over the past few days, but most of the time he's just sitting there and when he does try to walk he has a very obvious problem... any ideas? Should I cull him?