What does Krypto do while he's out in space in between Superboy adventures? The truth can finally be revealed. In Adventure Comics #167, we catch up to the super-pooch after he's helped Superboy with whatever nonsense, and he's happily chasing meteors and destroying them with his heat vision. And then he sees something that infuriates him:
That month, in Superboy #77, Superboy is having a bad day when Krypto puts in a treacherous appearance to make things worse.