My 15 month old GL Wyandotte has been limping for a week (right foot.) She is the runt of the litter. She is eating, pooping as usual but cannot get on the perch at night. She is free ranging and eating bugs with the other girls but sits down for a while after a dozen steps or so. Then she's up and the pattern repeats itself. Should I keep her separate from the others? Thanks for any advice. This is my first health issue with the girls.