I have some silky- cochin cross chicks about 7weeks reall pretty birds. But they're not verY big at all, I've been raising chickens for about 6 years and it always seems that the chicks with the mother that live outside ,grow alot faster than my chicks with the mother inside the coop, I feed the ones inside Chick-starter first for a while, then cracked corn, oats and scratch and the occasional greens and any leftover vegies and fruits. The outside chickens eat what they find after I give them something in the morning, when I feed everyone else. I had two hatches at almost the exact same time one outside in the yard and the other my silky- cochins in their pen. And right now at about 7weeks the outside babbies are twice the size of my inside babbies and I don't know why, I've been trying to raise the breed for about 3years but I always, always end up with one or two, thin reall light birds that get sick and die. It is so frustrating! I feed them twice a day, de-wormed them and they are still sick little tiny birds, when the outside babbies are fat and extremly healthy. The inside babbies are in a huge pen with 3 different runs and three different pens about 30 feet long and 5 feet wide, they are not in anyway in unhealthy conditions, they live on hardwood floors, fresh shavings every 3-5weeks and spoiled rotten. I have other breeds too, my prized golden laced wyandottes in the other runs who cant keep babbies but lose them, while the outside chickens are having babbies and keeping them it seems like every month, While my inside chickens are still on the same tiny hatch. Any ideas???? anything would be extremly helpful Thanks!