He wrote a story about:
Robotic animals.

A hundred titanium wolves,
attacking an evil empire.

A few plasticine doves,
delicate and pale, flying overhead.

He meant for the hero to kill off the flying bears,
the ones with supersonic speed and razor claws,
but ended up changing the ending.

His publisher claimed it was an environmental message.
The truth was: they were his creatures,  and too beautiful to destroy.