My old bull cross bitch had got alot of brain to her and surprised me how much brain she had got ! Boys have seen the bitch go and for a 5/8 3/8 more bull than grey she catches rabbits for fun !! Atm the I dont think I could get the most out of a collie cross as I think they need a different approach which as I said before in a good few years I will be one man and his dog and that will be a collie cur !!