Giant tortoises in Twycross Zoo, Leicestershire are being trained to walk faster, so they can get to bed more quickly.
Staff at the zoo are feeding treats to Speedy, 70, Tom, 40 and Shelly, 30 to make them exceed their normal plodding speed of less than 1mph as they cross a new, larger pen, the Daily Express reported.
Keeper Kris Hern said that they use a target and the tortoises' favourite foods.
They hold the target a few centimetres in front of them and when they touch it with their nose and feed them.
They then move the target further away and repeat the process.