HETERONYM

From The Enigma
NPL Magazine
June, 2020
ENDGAME

I gave my _ _ _    _   _ _ _ _ _ .
The vet said much good it would do him.
It left the thing _ _ _ _ _ _ _ _ _ .
Do you think I have grounds to sue him?

HINT:
CAT

Answer:

I gave my CAT A TONIC.
The vet said much good it would do him.
It left the thing CATATONIC.
Do you think I have grounds to sue him?