I think it's the nature of the beast! We tend to look upon our feline friends with love and awe at their carriage and demeanour and we dominate our dogs. Most people don't train their cats, take them to the park, go visiting with them etc. etc. They are more personal pets, more private, more just yours ( or should that be you are more theirs) instead of the whole world looking on and offering advice on the "problem" your dog has.