My 4 mo. old Buff Orpington Roo I noticed this morning is very very inactive, remaining still for minutes and upon moving is slow and wobbly and upon losing his balance lays down....I picked him up to reset his stance to observe what his response would be and he layed over and I propped him up. For the time being I have separated him from the flock placing him in a separate pin. Any ideas what I might be dealing with????????