I noticed a few days ago that one of my young pullets was limping slightly. She is 5 months old. Howevere this morning she i slimping alot worse and is just sitting about. I can't feel any heat or sweilling in her leg Does anyobdy have any advice on what i can do with her / what it mgiht be? Should i just keep her in a big box so she doesn't move around much and keep her warm and fed?