My girls have BIG lumps on their chests. I'm a city girl and have never been around chickens. I don't know if this is normal or not. The girls have been in the coop/ run for a few days since it was so rainy and we couldn't play outside. Today was the first nice day, so they got to run around the yard and eat all kinds of goodies. I was getting them back in the run when I picked up Mrs. Feather-Bottom and noticed the bump on her. I checked Buffy and she has it too. I didn't get to check the 3 others. They are acting fine (other than being wild since it's sunny) and eating and drinking. Here is a picture of Mrs. Feather-Bottom, my fingers are "around" the lump. Do I need to do anything?