It's all on YouTube, if you're ever feeling sufficiently brave and curious! I wasn't at all traumatized by seeing it at age 9, but I'd specifically asked to see it because I loved the book so much, and bloody-minded geeky child that I was, I approved deeply of it for being so faithful to the story. (I've never been terribly squeamish about blood or movie violence or predators, mind you; YMMV.) The scary/bloody bit that made the biggest impression on me was towards the end when Bigwig and General Woundwort are fighting -- both Fiver's premonition of the warren's destruction, and the actual imagery shown when Holly is narrating the tale of what happened, is creepy-looking but sort of semi-abstract/symbolic rather than a straightforward realistic portrayal of what happened? Whereas Bigwig's fight was very realistic, savage and bloody and all playing out in real time (and Bigwig was one of my favorites, and Woundwort was a seriously scary mofo both in the book and film) -- that was a bigger deal to me emotionally, in a scary-but-thrilling way, than the vaguely psychedelic portrayal of trees turning into menacing shadows over blood-colored fields or ghostly tormented rabbit heads swirling around in blocked tunnels like smoke. But I can totally understand how younger kids in particular, or ones who hadn't read the book, might have been totally blindsided by what they expected to be a cute kiddy cartoon about bunnies -- and the first scary scene, Fiver's vision, comes in the first fifteen or twenty minutes! And all the rest of the potentially distressing bloody stuff -- attacks by cats and dogs and rats and owls, snares, rabbits biting and clawing each other, the roadkill hedgehog -- is right up there realistically on the screen, no Disney-style Bambi's-mother-dying-offscreen coyness here. It's not all death and bloody trauma, of course, the quiet peaceful scenes are there too, and there's some utterly gorgeous art -- but viewers who get deeply distressed by things like documentary footage of predators hunting are probably best off skipping this.

Here's one non-traumatic scene, the bit where the rabbits find Kehaar, if you want to check out the animation style safely: