Cows and Octagons

Riding along in the car the other day, we passed a small cattle ranch. The boys began talking amongst themselves about the different cows they saw.

I listened quietly, enjoying the fact that all three of them can communicate so well these days. The conversation took a heated turn, however.

Jack: Cows can make circles.

Liam: No, they don't! Cows don't make circles!

Garrett: No, Jack!

Jack: No? Oh. [pause] They make octagons?