My Australorp Roo (from the TSC pullet bin, ha ha) is.....massive. He is about 8 weeks old now? And he is bigger than my 10 week old RIRx Roo...... Do they grow incredibly fast or are they supposed to be way bigger than others? The pullet is pretty big too, but my roo has just about doubled in size in the last couple weeks, and his feathers are still coming in! I have some leghorns and buttercups (pullets) the same age and he is easily double their size....although they still kick his tail feathers six ways to Sunday. His legs are HUGE.....at least twice the size of the pullet legs. He has been feathering in soooooo slooooowly. He is still prickly to pick up as most of his feathers are very short...... I like to call him my Australoops.....don't have any good pics showing his size. you can see his legs as compared to the Australorp pullet behind him. And his height compared to the leghorn pullet next to him. I don't know anything about Australorps.....are the Roos really big?