I am new to being a "Mother Hen". My Black Jersey Giant Peep is 2 1/2 weeks old. We just got her last Saturday and I noticed that her underside has become increasingly swollen over the course of the week. I picked her up last night and the swelling felt mushy, and the skin is red under her fluffiness. She has been "waddling" like a penguin since yesterday morning. I just noticed that she is having difficulty lifting her left leg, so I picked her up to check out the swelling and on the left side it has become firm. It feels like it is about 1"x 0.5" little "egg shaped" hard/firmness. She is eating well(medicated chick crumbles), drinking vitamin/electrolyte water(just started today), and active. I jumped the gun and took them outside for about a half hour, once yesterday and once the day before. Yesterday they had a few bugs; spider, pill bug, baby centipede, baby earwig, ants, while outside; crickets and a meal worm treats in their brooder. I spoke with the breeder today who stated that they do not let their chicks touch ground until they are 5 weeks old and no treats until then also. They treat them like babies and recommended the vitamin water to perk up the GLW and mentioned that maybe the BJG is overeating. [I have 5 other chicks; 4 (Partridge Rock, Barred Rock, Light Brahma, Americauna) are fine and thriving; 1 (Golden Lace Wyandotte)has become a little less active and decrease in appetite but eating and drinking, keeping an eye on her too.] I am very concerned about the swelling on my BJG though, especially since I can now feel firm/hardness under the left leg. Any ideas what may be wrong with my little "Penny"? Thank you.