Who says animals can't smile? Hilarious pictures show grinning dogs, cats, birds ... and even LIZARDS

These ridiculously cheerful creatures grinning into the camera are sure to brighten your day. In a selection of happy snaps, animals, both furry and scaly, are shown beaming as they pose for pictures. A pair of parrots share a joke with the camera and a dog can't help but literally roll on the floor laughing.