Had sheep eat the rubber guy line tensioners off a tent.
Been woken by an alarming scratching all around a tent and found a hedgehog walking between the fly and inner and being unable to reverse, making its way around three sides of the tent.
Been menaced when camping in East Africa by rock hyraxes seeking food - they may be small but they had long sharp teeth and remarkably beady eyes and were very, very forward.
Also in East Africa had food stolen by monkeys. They dropped most when pursued and the only bag they got away with contained shortening. The lucky monkey was pursued by its fellows, anxious to share, so the winner stuffed the lot down as fast as it could ... and was noisily sick a few minutes later
When caming in the Alps, friends I the next tent had a billy goat try and force its way in; a hefty kick to its gonads saw it off and it did not return.
Cow slobber is pretty sticky and nasty on your tent. Although the spectre of being trampled by accident is more off-putting.
Returning to the bears in the thread title, Mrs Lower Gear's family owned a
cabin shack in the north woods of Minnesota where bears were an issue from time to time. Returning to the shack after a day fishing my father-in-law and his friiend could hear movement within. "Someone's stealing our stuff!" "You take the door and I'll flush him out. We'll teach him a lesson!". Before they could act, a bear climbed out through the window, taking the frame, glass and flyscreens with it...