Need a little advice!

if possible put a collar on both dogs and light up the mt cur male when he becomes aggressive towards the other dog...also at about the same time give the other dog a lighter shock just to let him know he can not respond...reason being is that if the mt cur gets the correction after a while the other dog will become aggressive towards the mt cur and the cycle won't end...the mt cur will back off and the other dog will step up to alpha and a couple weeks later the mt cur will be back at it again...so get both and it will stop sooner than later...like already said...light up that mt cur so as to make a statement that he won't forget...I keep a cattle prod handy as well...works great for dogs in the box...