That confrontation just before the scene with the bear. And of course, the bear itself.
In particular, right after Amos wounds the bear's shoulder. It roars in pain, then looks down at Amos with a Slasher Smile that the Joker would be proud of.
The confrontation between Tod and Copper at the den. You want to see what a realDeath Glare looks like? That kind of snarl is what an animal does when it intends to defend something to the death - and no less.