mate i run bull,stag,greys and use them on feral pigs,they very fast and will hold good hogs on the own once on contact they go straight in and hang until told of..i have sold pups to dingoe chasser here that use them for running down and caching dingoes.they work best when run in pairs and will kill dingoes but best to go up and shoot dingoes before to much battle is done,now these dogs get used every day of the week and are good all round dogs and don't take much training,just get them out in the bush when they are old enough to start chasing