Those kind of lawnmowers are cute, but destructive. More than once they've wiped out entire crops in my garden in just one early morning feeding frenzy. They love the young succulent shoots but are not adverse to just nipping off older plants and not eating a darn thing.
They will find their way around, over or under multiple layers of fencing. The stinky liquid repellents seem like Sriracha to them. Last year there was an entire family munching at my backyard salad bar. Broke a toe running around to chase them out. Finally decided they were in the same class as moles and voles and put them on the persona non grata list. The back yard has become Hotel California for rabbits....they might sign in, but they don't leave.