A few weeks ago, I picked up 19 cornish x day olds. I brought them home and then distributed 4 to friend A and 8 to friend B. The other 7 stayed here. Friend A kept hers in what used to be a lizard aquarium inside the house for the first 2 weeks and fed them organic feed Friend B kept hers outside in a hampster cage and fed them organic feed I kept ours outside in a dog kennel and fed them organic corn and soy free feed Friend A has chickens that are now 1 1/2 times bigger than the other 15 chickens. They have more feathers and are just huge and healthy looking. She seems to have 1 rooster and 3 hens. They are about 4 weeks old now. What on earth is making them grow so fast? Any ideas here? I thought it was the feed, but then realized that both friends are feeding the same feed. One thought is that she had a light on them that had been for the lizard. That there was something special about the spectrum light. But the others got real sunlight. Also, after the first 2 weeks, these also got real sun light. I am so curious!!! Would love to figure it out and then repeat it and make it a 4-H project for DD to put at the fair. Sorry I don't have any pics.