Linda, on a separate topic of neutering. This is from a letter I rec'd from Ian Dunbar
Neutering male dogs DOES change their behavior to some extent. They are likely to roam less (if given free range) and urinate less, yet still urine mark and still use the same urination posture. Thus, scent marking is not resolved, but the frequency (hence volume of urine) is much less.�
However, castration has no effect on dog-human aggression, does not make male dogs less aggressive to other dogs, alter their rank in the hierarchy, or appear to change their personality much. BUT castrated male dogs no longer smell like intact males and so this dramatically changes the behavior of other male dogs.�Castrated male dogs smell more like anoestrous females.�Other male dogs react towards castrated males as if they are females �and so, other male dogs harass or threaten them less and hence, the behavior of the castrated male eventually changes (feeling less threatened). Castrated male dogs are involved in fewer fights with other males and their aggressiveness is reduced, not directly by castration, but indirectly by the altered behavior of other males/."
note , it doesn't alter their rank in the heirarchy.
Dave and Molly
Ian Dunbar was awarded the Outstanding Achievement Award from I.P.D.T.A. Here's a picture of me accepting the award on his behalf.
Member of IAABC ,International Association of Animal Behavior Consultants , Member of Pet Professional Guild