My chicken is about 3 months old and she has been limping for about 5 days now. Her knee (if that is the proper term) is swollen and she doesn't put much weight on that leg. She mostly lays down, but occasionally limps to move a foot or two then lays back down. I have pretty thoroughly looked her over and haven't found anything else wrong with her- no sores, no cuts etc. I think she might have landed wrong when flying off the perch in the coop but I don't know for sure. She isn't showing signs of improvement yet, but doesn't seem to be in too much pain- she doesn't cry when I touch her knee. Do I take her to the vet? Do I wait it out? Do I give her anything for the swelling? Help!