I had one I had to move on last Xmas . Beautiful animal, great off the lead pita on the lead. However he was extremely aggressive and a complete Alpha. Great if I was at home but if I went away working, when I got back I had to either ignore him for two days or take him outside and scruff him until he. Submitted. Not easy with a 28" , 40kg dog.
In the end he couldn't be trusted around my toddler though he never showed any aggression towards him ever. Was totally stock broken though and now lives with a hill collie on a big farm at Shap.
I would never have another, he was a throwback, bigge