Originally Posted by Mouth-Brooder-Fanatic
what if they're all preggers and have let him know?
+1. It is possible that if all the females are pregnant, they are no longer sending him the signals that they want to breed. Before changing anything, check out the females.
A second possibility is that he has past his prime breeding age and won't ever be the stud he once was. If the females are pregnant tho, he has done his job (even if it is not in a "studdly" fashion
Hope this helps...