Adding to my flock, how to barred rocks get along with white leghorns & sexlinks?

[fangaddict]

P.s. my mutt is a white rock leghorn mix I think basically she is a white bird with black spots, leghorn body and feathers, small, tiny head, and blue/grey legs, and lays beige eggs. But honestly I don't know what the heck she is. I should post her pic on the what the heck is this thread!