I'm fairly sure my big SS (speckled suss-ex ) is a roo. I can't post pics, because I'm a newbie, so here's just a description. He has a much larger and redder comb and wattle than my other chick of his age. Green, shiny tail feathers are coming through and the tail itself is really tall and curvy. He fights with his 'sibling' ( they've been raised together ), hackles up and with claws. They don't actually hurt each other yet though. He's very cuddly ( not sure if this counts for anything ). His 'sibling' I can't tell at all. He/she is a runt, with a few thing wrong with it. There are two fleshy bumps on both of his wings, the wing feathers are 'messy' and he/she is very underdeveloped. Thanks in advance. As soon as I can I'll add pics.