Killian is 5 months old and we are not going to neuter him, we plan to stud him once he gets old enough and get everything in order. I am wondering, when do we expect him to get "randy"?? Unfortunately we have this dog aggressive shar pei next door who is a "breeding female" by their words(I highly doubt since she hasn't ever been bred nor can she even come near another dog without trying to bite their face off). But since she isn't spayed and they don't have a fenced in back yard and they let their female run free in the yard to go potty. When should we expect Killian to start getting interested in a female in heat? We have a double pane privacy fence, six foot high, so there is no escape for him.... I'm just curious because we've never had a male dog that hasn't been fixed before. Any ideas on when males become interested??