"I named it the Kinder-squirrel, after the treats. It always goes after them, other sweets do not seem to interest it as much," the manager of the store in Jyvaskyla, central Finland, told Reuters.
The confectionary, which is intended for children, has a toy inside.
"It removes the foil carefully, eats the chocolate and leaves the store with the toy," Irene Lindroos said.
Unfortunately, the bushy-tailed thief does not clean up after itself, but leaves the wrappers behind, she added.
Squirrels have a well deserved reputation for being clever and adaptable animals. Many a home owner has seen the small rodents raiding their supposedly "squirrel-proof" bird feeders.
Kinder-squirrel! Ferrets really like the capsules that the toys come in, but they usually could care less about the toy itself.