I have had to bring my chickens to the vet twice (dog attack and hawk attack) and both times the vets said the chickens were underweight. I have Layena feed (used both pellets and crumbles) in their feeder all day, and bring out treats at least three times a day--oatmeal, raisins, bananas, noodles, etc. They are mostly free range (out 75% of the day in a large fenced yard), are one year old, and each lay an egg every day--even through the winter with no additional light. They are active and seem happy. Should I worry about it? Any idea how to put weight on a chicken? Thanks.