The Handsome Hound of Steel!

Oh come now Krypto, shouldn't you be trying to explain to your master how you gave birth to a litter of Super-Pups?

Sure enough, Krypto didn't just get changed into a handsome (shouldn't that be beautiful?) Collie, but a bitch into the bargain.

Who did the dirty deed was never revealed, but Krypto had a guilty look on his face for a long time after the effects of that 'Red Kryptonite Cloud' faded.