Interesting, many herbivores are very capable fighters.  Have you ever seen videos of deer beating the crap out of an idiot who got too close?  They also have antlers which they can use to keep predators at bay.

Elk and Moose are huge animals with a lot of destructive power, Moose have totally trashed snowmobiles with their antlers.  What about Buffalo?  I would be much more worried about being attacked by a single Bison than any single wolf.  Hippos, Rhinos etc are also extremely dangerous when threatened.  One on one most large herbivores are much more dangerous than their predatory counter part.

Now rabbits?  not so much, but they are quick (could be messengers) and are low to the ground and thus could bite ankles and such as a distraction etc. 

But just because herbivore's don't have 'claws' doesn't make them 'safe'. And plenty of herbivore's DO have claws (including rabbits). Hippos and boars have tusks, rhinos and bison have horns, hooves can cause serious injury, weight is a weapon too.  Just cause someone doesn't want to fight doesn't mean they can't.

Edit: And I forgot about these!  Deer with fangs! and unlike Jack-o-lope, these guys really exist!
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  [1]: https://i.sstatic.net/rNVhN.jpg