I have a BBB hen and the last few days I have noticed she is reluctant to walk. Two days ago she seemed fine and was getting around (when she walks she kind of waddles, swaying from side to side). Yesterday she did a lot of laying on the ground. This morning she couldn't get up. She is a free-range bird, about 9 months old. I was hoping to keep her to raise chicks, but if this problem is due to weight and not illness (she must weigh a good 20 lbs) maybe it's just her time and she can be Thanksgiving dinner. This is the first turkey I raised from a poult. Do BBB turkeys get too big to walk?