jennifer aniston has employed her pet dog norman to sniff out her prospective boyfriendsthe friends actress has told her pals that she is going to let her cherished dog to check out future beaus so that she doesnt end up with the wrong man againaccording to reports anistons corgiterrier cross breed loved her exhubby brad pitt but would growl whenever her exboyfriend john mayer was around herjennifer dotes on her dog norman she takes him on set whenever she can and treats him like a king the daily express quoted a hollywood pal of the star as sayingthe friend added she realised normans reactions to people are usually spoton and she has joked to us that the man who wins her heart will be the man who wins normansmeanwhile rumours are rife that the 40yearold actress has got close to her latest costar gerard butler on the set of their new film the bounty