I have crossed a RIR roo on the big broiler breeder hens ( the kind they use in the long houses to lay eggs that are incubated for hatching the meat birds) The owner gave us the escapee hens after they went out at the end of the season. But anyway, since the hens are Dominant White, they chicks came out to be white with black dots and layter as they matured, they got some nice red leakage that looked a bit like weak red lacing under the breasts. I raises them just like regular chickens and they were big heavey birds and didnt have any leg problems so that sounds like what you are wanting. But I sold them just before they started laying so I cant say how they would have been as layers. But it would be a great choice if you wanted meat birds.