I guess the bears and yotes aren't quite so fierce up here every dog I've had except the one lap dog has had no trouble chasing either away and none got hurt. Have had about 10 different dogs they were all heinz 57s 70-100 lbs. Well actually Timber my wife's dog when I met her may have been a pure Blue Healer but he came from the SPCA so we don't know for sure. And right now I've got a pure Catahoula, jurries still out on her at 2.5 years old, she's done OK with the couple bears we've ran in to so far.

Anyways had to look up the Karelian dogs never heard of them. Cool looking dogs. Personally they sound a bit too keen on the job for my taste I don't want to have to find and pull a dog off a bear I want it to chase the thing a couple few hundred yards and come back or get it treed and come back when called. YMMV.