I suppose I should be handling my birds more but I'm just not that type of chicken-raiser I guess. This is my first time with chickens. I have 6 EE's and 6 ISA Browns. I feed them 20% chick starter, unmedicated. I feed them in the morning and at night. I give them one whole coffee can full of food at each feeding. (The regular size coffee can, not the little ones.) Also lots of fresh water and their pen is very clean. Today I noticed the smallest EE was looking droopy. She let me pick her right up which is unusual. She looked okay but when I picked her up I could feel a very, very prominent keel bone. I put her back down and she fell over on her side and stayed there. I stood her back up and then the wind blew and literally knocked her over and she just laid right there. I sectioned off the coop and her put her so she can see the others but is isolated. She is warm and has food and water. That prominent keel bone bothered me so I checked and ALL my birds have that! None have the other weird symptoms of the little EE but they are very underweight. I am so horrified that I haven't been feeding them enough! How could I let this happen? I thought I was feeding them enough food, plus they are outside during the day so they are eating bugs and grass and such. I am very upset with myself for not handling them more often, perhaps if I handled them more I would have caught this. How can I fatten them up? Is there a better feed I can get? Supplements? Or are they maybe sick?