Paraphrased from The Book of Animal Ignorance by John Lloyd and John Mitchinson
So many hedgehogs in have died in the UK from getting stuck in food containers that McDonald's redesigned the McFlurry container to be hedge-hog proof.
Badgers are strong enough to pry open hedgehogs when they roll up into a ball. Foxes instead pee on the hedgehog to make them unroll.
It takes more chloroform to knock out a hedgehog than it does any other animal due to the hedgehog's high tolerance for poison.