Is the Three Mile Island catdog real?

It is physically impossible for cats and dogs to mate, let alone produce fertile offspring. I assume Three Mile Island refers to the nuclear power plant accident. I have never heard of any freak animals stemming from this, though mutations are possible due to reactions to radiation contaminated water, etc. By the way, there was a really moronic (like retarded) comic book (called Huckleberry Hound meets the Cat-Dog) floating around in the seventies. Seemed to have gender dysphoria or homo aspects rather like some other Hanna-Barbera Cartoons (Top Cat, for example). But a Cat-Dog? Sorry. Nature no can do!