New teeth For Crab-Eating Fox

My choice of animal is the Crab-Eating fox which lives in the rainforest. The Crab-Eating fox has blunt or dull teeth. They eat crabs and smaller mammals. The tissue of crabs and smaller animals can be hard to break through with dull teeth. So I would want to change the sharpness of the teeth because I think it will be easier for the fox to break the prey's skin.The new adaptation should give the fox the ability to catch prey a bit easier as well. This would also allow the fox to be eating every day and to not be hungry anymore. So, I hope this makes the fox better at hunting in addition to that.