Hotel bosses admitted staff killed the kitten, but insisted in a now deleted Facebook status that she was humanely killed. Only a Vet can humanely euthanize a cat. This kitten was simply hungry. The staff does not believe they did anything wrong.
Donkeys are intelligent and sensitive animals, displaying loyalty to their guardians in the way that dogs tend to do. Adding yet another species to the killing floor, and one commonly considered a companion, is a mistake.