My friend feeds her cat Pop-Tarts all the time. As long as it's not... chocolate overload, well, your cat should be fine. They've been feeding that cat Pop-Tarts since he was a kitten, and he's 6 now. I went with them to the vets one time and even asked xD But yes, the stuff does the same deal it does on humans. In other words, it can make your cat chubby. And cause health issues later in life, if fed often enough. I suggest laying off the Nyan amusement.