Spare a thought for the vets at London Zoo who have been looking after Lucifer, the 30 stone lion.
The Asian big cat's been given a heath check to make sure he's fit and ready to join a new breeding group for the endangered species in a new location.
Zookeepers had to train the 11-year-old lion, named after his studbook number 666, to lie on his side so they could administer an anesthetic with an injection.
He's part of a special Zoological Society of London campaign, Lion400, aimed at raising £5.7 million to save the species.
Vets gave him an all-over examination in his enclosure down to checking the inside of his mouth to check his teeth.
He's been given a clean bill of health and will move later this week.
Police have called off a search for a lion reportedly on the loose in Essex.
Officers have spent almost 24 hours combing the countryside around Clacton-on-Sea after a group of residents yesterday claimed to have seen the king of the jungle near Earls Hall Drive in St Osyth.
But after search teams found no evidence of the big cat, the force this afternoon decided to stop looking.
Denise Martin was the first to spot the suspected lion yesterday evening from the windows of her caravan near Clacton. She said it was tan coloured with a white chest.
Mrs Martin, from Canvey Island, was spending the Bank Holiday weekend at the site with her husband, and brother.
Police hunting a lion believed to be on the loose in Essex were contacted by locals who had taken a photograph of the big cat.
Roger Lord, of Earls Hall Farm, St Osyth, said a picture of the suspected lion was taken by residents in caravans on the farm land and passed to police.
Residents in parts of Essex are being warned to stay indoors after reports of a lion on the loose.
Firearms officers and police helicopters have been searching for the lion overnight.
A Essex Police spokeswoman says once it's light, officers will look for signs it had been there, such as pawprints.
Police are continuing to hunt a lion that's thought to be on the loose in Essex. Officers have enlisted the help of experts from Colchester Zoo who believe the sighting to be genuine.
Pub landlord Dave Sparks, who runs the Red Lion pub in St Osyth, says the police hunt is "surreal".
Firearms officers and police helicopters have joined the hunt for a lion that is thought to be roaming loose in Essex.
Residents have been told to stay indoors as search teams worked through the night to track down the large cat, which was spotted in a field by a member of the public last night.