I just bought two Treeing Walkers. They're alittle over a year old and litter mates. Both of these guys have been started on Racoons and we're in the process of teaching them to run Bear. Been out twice hunting Bear with them. The first time out we let them go with the rig dog, they made it to were the bear was treed, even though it was about 20 min's late, they still figured it out, not bad for the first time out.
We also have several German Shorthair Pointers. Two of which I think I can make bear dogs out of too.