I think it would better if there was just a risk that large wild animals could attack you but are not auto hostile. And perhaps wouldn't even necessarily chase you if you fled.
I agree with X-tasy in that if you kill one animal the entire species should not become hostile towards you, that seems silly. I think there was some problem like this in Divine Divinity where if you killed too many wolves all dogs became hostile. Then in towns and the farmlands dogs would attack you too, horrible having to kill either.
I feel like I should start a wOlveS order to take on those pesky weresheep!
I fully agreed with all this!!
In DD I accidentally killed a cat when I was trying to kill a rat and all cats now where angry
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