I have two welsummer roos and only need one. They are very pretty and just getting to the mating age. So far there has been no aggressive behavior at all. My six year old is in and out of the pen a lot and no problems whatsoever. They are supposed to be from the Kelly something or other line. (only have them cause I like them so not real up on all the lines etc.) I am guessing he is about 3 1/2 months old. this picture is a month or so old and not the best but here is one of them. They look pretty much identical so if you have seen one you have seen them both.