I currently have 1 roo, he crows continually, and sometimes even in the middle of the night. I think it just depends on the individual rooster as others have stated, not necessarily the breed-although some breeds are known to be quieter than others. I did have 2 roos a while ago, and the dominant one did all the crowing. the lesser roo crowed maybe 8 times a day, while the alpha roo crowed every 10-30secs. Alpha roo got all the "action" as the hens didnt give it up to the lesser roo, and alpha roo wouldnt allow lesser roo to try, so I think his "not getting any" has nothing to do with it. Also the lesser of the 2 roos wasnt allowed to crow. If he tried the alpha would come over and give chase or try to mount him to show dominance. Perhaps you just have a very vocal roo, or perhaps the more dominant roo of your flock will put an end to it after he gets a mind to.