Cheers for that Bunnys, I know of a few lads that have bull x herders that they train for bite work and i'd say they switch off better than some of the Malis. From the dogs I've seen work (herders and mals) I'd say they could match a bull for tenacity (although I'm sure many will disagree). I, myself have a KNPV bred Herder x Mali pup on at the moment, confident as anything with a decent full mouth grip.
yeh they would in what you say true, my 1x gsd x grey very full on type dog, ive had 3 bullx greys before and Buck is as switched on as much as my bull xs were , he as strong or more