I have 13 cornish x's and need some info on their feeding and habits. They are now 10 days old (hatched 2 Saturday's ago). They are growing much faster than the egg-layers I got at the same time from MM (egg layers are Buff Orpingtons, Barred Rocks, and Black Austrakorps). The cornish x's have been drinking more from the beginning and have only today, for the first time, surpassed the egg-layers in the amount of food they are eating (13 cornish x's, 13 egg layers). I have noticed over the last day or two that the cornish x's seem to be breathing a little hard. Thay have always layed around quite a bit more than the others, but this heavier breathing - even when they are laying around is new. Is this normal? Is this just because of their size/weight? Is there anything I should be doing special with their food and water? I have a supplement called Broiler Booster (from MM) that the cornish x's get in their water and I am feeding them Dumor Chcik Starter (24%).