Meet Cain.  He was our big, blue male.  Although he was getting up in age, you would never know it.  He had a verticle leap well above your head!!! He liked to run and play but came to a quick, immediate stop when he got to you so you can scratch behind his ears.  He had the best personality!  Even though he was 100% American he had the big, blocky head that looked like he was of European blood line.  He passed that square head on to his puppies.