Yeah. It might be a bit strong for new players to face, but it all depends. It's certainly within their ability to defeat it, but it kind of depends on how they react for the first round or two.
I don't think another kind of animal is needed, but maybe for the new folks, have the bear be Fatigued, so it can't run or charge and gets -2 Strength and Dexterity. How and why it got fatigued I'm not sure, but maybe something else drove it away from its den, and it's been searching for a decent meal ever since. I dunno.