Hiding in plain sight! Witness protection gives material witnesses whose lives are in danger new identities. We know that dogs recognize each other by sniffing their behinds. The funny cartoon on this birthday card presents an amusing illustration of how a pooch disguises his identity by covering his hind end with a cat mask! The mask will fool the casual onlooker and enemies will be unable to recognize him by his scent. But when it comes to birthdays, there is no hiding from them no matter what disguise you wear.