Thus Woofed ZarathustraI think it went something like this:
God: Look at what I just made! It's cute, friendly, loyal and will bring happiness wherever it goes. I call it "Dog."
Angel: That's great, sir ... there's just one problem.
God: How dare you! This is my perfect creation!
Angel: Oh no, the dog's great. It's just that it can't possibly survive in a world with so many dinosaurs.
God: ...
Angel: Sir?
God: Nuke the damn lizards!