Dog Week: Mystery Monday: A Plot Uncovered

Another kitten found dead in the road.
Miss Zoe Boxer knew this could not be
Coincidence! But information flowed
So poorly in her neighborhood. "I'm free,"
She reasoned. "Ev'rybody else is stuck
In fences. Only I can roam about
And find the truth! All right, then, wish me luck!"
From yard to yard she rambled. Over shouts
From humans to "Go home" she did consult
With all the canine sages. No one knew
Why feral kittens met with such results.
But then, in one vast driveway -- yes! A clue!
A dish of antifreeze was proffered there.
No critter who drank of it lived to share!