You'll probably be okay. I won't say for sure there won't be any knock down blood drawing fights, but when they grow up together they do tend to get along much better. I have two roos for my flock who grew up together, and when they were first settling the dominance issue, there were a few scuffles, but nothing major. Blood was never drawn. Now they peacefully coexist except when the dominant roo decides to remind the beta roo that he is in charge, and that usually only involves a swift peck and the beta roo takes off before anything escalates. By the way, one boy is Welsummer. I did also have a third, a brahma, who was the top roo, but he found a new home because when he was cooped up with the other two boys over the winter he decided to tear all the feathers out of their backs. Even with that, blood was never drawn.