Replacement Squirrels only for the Hide-A-Squirrel dog puzzle: This engaging toy works as a reverse puzzle. You hide the squeaky squirrel pieces inside the plush tree trunk; dogs use their problem-solving skills to sniff them out. By encouraging them to seek and stalk the squeaky prey, the Hide-A-Squirrel provides pups with an outlet for their instinctual behaviors. The removable squirrels can be hidden again and again for endless enjoyment. And, for even more fun, you can hide treats and other toys inside tree trunk.