Sounds like Ray is suitably feed restricted if he has to scrounge for most of his food. The half broiler chicks will grow faster than regular standard bred, but not as fast as broilers. I feed the hybrids regular chick starter and not the broiler starter because I want to breed them later, and I don't care how fast they grow. The way that you feed your birds I don't think that you will have to feed restrict. It sounds like a low energy diet.
Most broilers are dominant white, but a few lines are recessive white.
Depending on what type of white Ray is you could get a strange assortment of chicks. If Ray is dominant white most of your chicks will be mostly white, but if he is recessive white you could get an assortment of colors. I have tried unsuccessfully but am still attempting. Thanks, looking forward because I've failed so much. You have to feed restrict them.