I have 3 rir roos. They are now all almost 5 months (around 19 weeks) and they still aren't crowing. I have read so many other post about how they start around 12 weeks but not so much as a peep from mine. I know they are roos bc they have all the signs (legs are tree trunk size, double the size of my females, combs, waddles and one tryed to mate with my female). I've even tried showing them sound clips of crowing, they just turn their heads sideways (i wonder if its bc i spoiled them growing up...they are more gentle than my hens!). I know i probably should be grateful for less racket but ive had raccoon problems recently and would like to be alerted if something were to come near again.