I posted the picture to show I am no longer raising them in large runs individually. Couldn't keep them from digging out. Now I have 4 (soon to be 5, maybe 6 if I can fit it) individual pens plus two breeder pens which are much larger.
Chicken genetics are odd - yes, if you add a meaty rooster, most of the offspring will tend towards meaty - but some won't. and if your meaty is a Cornish Cross (a special kind of semi hybrid at this point), my experience is that half the offspring will get a measure of larger size and fast...