Buff Orpingtons

I am new to this site and also new to raising Chickens so have a few questions, hope you all can help. I first bought 12 silver wyndotte pullets for egg production, they are laying and doing nicely but I am a little dissapointed in the egg size. A few weeks after we purchased the wyndottes I guess we felt like real chicken farmers and ordered 100 buff roos...their were 6 hens that were mixed in with the roos so thats great for me. My question is...our buffs are now 11 weeks old, an owl got into our pen and killed 1 buff roo and 2 hens...that is when we realized that they are awfully scrawny, all bone structure and not much meat. we are feeding them grower in a hopper type feeder so they can have all the food they need, and scratch grain , We are thinking that we need to maybe restrict the meat roos pen area, it is now about 400 sq feet ( their are about 90 roos in the pen now.) Also how are the egg size with the buffs. How long do we have to raise the buffs to get them to eating size? Thanks in advance for your help..

 

Thanks for the pen advice, I also forgot to ask...how are the Buffs for laying? Do they produce a larger egg than the Wyndottes? And has anyone had any luck crossing wyndottes with buffs? Will that improve the breast size on them? thanks again