Children's favourite Cheeky, the 22-year-old donkey, was due to star in the show - until she was attacked in the night at her farm by them.
"We have been searching for the attackers since the knife assault in November when the donkey was left with sixteen puncture wounds to her abdomen, hind legs and neck," The Telegraph reported quoting a police official.
"The male suspects were arrested on Christmas Eve from Cwmbran, South Wales, for inflicting deliberate injuries to Cheeky and have been bailed pending phone and forensic examinations," they said.
"It is a shame that we are having to hide Cheeky away while she gets better because her appearance could upset the children who visit the farm at this time of year," she said.
Despite sharing a paddock with two other donkeys, Cheeky was the only animal injured at Greenmeadow Community Farm.
