Hi there, I am wondering what would be the best breeds to cross to produce a great egg layer? I lost a whole bunch of chickens, so I have a small flock of 10 (1 R.I.R. rooster, 5 R.I.R. hens, 1 Barred rock pullet, 1 R.I.R./White leghorn crossbreed cockerel,1 White leghorn hen, and 1 Brown...