G day mate, i hunt with dane mastiffs and i agree with the boys on this one. I generally start taking them nout in the crate around 3, or 4 months old. when they start having a whine when the other dogs are doing the buisness i;ll let em off. My only advice is dont let them off around bigger tuskier pigs untill they start showing a little promise and confidence, you'll only end up dinging their egos and slowing there progression...... good luck with it mate