A fat hedgehog has been put on a crash diet.
The spiky creature - nicknamed The Big One - has been forced to lose weight as he weighs 3.8lbs, around three times the size of a normal hedgehog, and can't roll into a ball.
Carer Darren Squires, who works at Oak and Furrows Wildlife Rescue Centre in Cricklade, Wiltshire, told the Daily Mirror newspaper: "His size is a hindrance to him and now he can't roll up tightly in a ball. If he was released into the wild he wouldn't be able to defend himself. He needs to get on the treadmill and we have got to get him to lose weight.
"We have put him in an enclosure so he has to forage around. His bedding is in one part and his food in another so he has to do a lap to find his food and burn off some energy."
The chubby creature piled on the pounds after he was rescued by an animal welfare volunteer four months ago and was fed puppy food and dried mealworm.
Darren explained: "Hedgehogs store up a protein-rich fat over the winter for when they hibernate. But this one has taken full advantage of not needing to hibernate and has kept his stores up too well, so much so he has ballooned."