Fuckers don't deserve to be that heavy, that fast, and have a ranged attack by flinging their shit. Pick two to keep, Hippo. You get to keep the bite by default just because it can look fuckin goofy.
There's no way a grizzly bear could beat a rhino. The largest grizzly bear isn't even a quarter of the weight of your average rhino. It would be as fair of a fight as you vs a grizzly bear.