Didn't see a tie, cause as soon as I got home they were put in separate areas again. He's never been used as a stud maybe he did'nt know what to do.LOL My son feels like s*** as he wondered why they were in separate places one in the house one in the garage. He says from now on they will go back exactly as he finds them. He doesn't stop in that often, figures it would be when I wasn't home!! And from now on there will be a big sign on the door announcing the season, the sheltie is a very clean girl if you don't check her daily when she is due you wouldn't know she was in heat until she started to flirt...Jill