OK, here's the background - once, many years ago, we had 2 pet chickens, and we didn't know what breeds they were. One was probably a rhode island red, or something related, and the other one was a commercial meat bird, genetically bred to gain weight. We fed them chicken feed and they also ate bugs and grass and cheerios and leftovers and anything on the compost pile. The RIR remained skinny and energetic. The commercial meat breed got VERY fat. We read online about them getting so fat that they can't walk. We actually made her "excercise" and she seemed happy. This was long ago. Now, we have 2 beautiful Buff Orpingtons who are about 16 months old. I buy them a good commercial chicken feed (which they actually don't eat much of), but they also eat bugs, grass, and I give them black oil sunflower seeds and all of our household leftovers EXCEPT for anything with meat in it. So, I give them everything from our watermelon rinds, to half of a peanut butter sandwich, leftover rice, veggies about to go bad, lettuce from the garden that went bitter, leftover pancakes, etc. One of our Buff Orpingtons is chunkier than the other. Not fat like the meat bird was, but we are wondering it is possible to overfeed them? They don't get a whole lot of exercise. Unfortunately we have a bad hawk problem here, so while we do let them out of the coop to eat grass every day, we put them in a pen which we move around the yard. So, should I worry about their weight? Can they get too fat? Should I not give them leftovers? Thanks!