I got 28 cornish X and 1 is a bit smaller than the rest, about 5 days ago I noticed this one wasn't walking much.... it doesn't go to the feeder. I have to put feed and the waterer right next to it. It scarfs down the food and water. the other ones just walk all over it like it's not even there. It did hobble over to the light last night for warmth but doesn't move otherwise. I'm just wondering if I'm wasting feed keeping it alive? I don't know what is wrong with it so I don't plan on eating it. should we just end it's life? and what is the best way to do it at this age?