To be honest since ive had em theyve always been good together in kennels and on the couple when out with my other older dog. But ive come home from working away and had this dropped on me. I thought she was exadurating but they had a proper lock on eachother in front of me ,so ive separated em now in the kennels. Ive had bull bred stuff before but these two have some right edge on em but going at eachother is new.