Tryng to Explain...

The other day I was taking Miss. Independent to her dad's and as we were driving we passed a truck hauling what appeared to be cattle supplies and as son as we passed that truck, we came upon one actually hauling cattle.

Of course she asked me where they were going and I explained they were going to a farm. I suppose she thought they were on their way to some cow paradise. I really wanted to tell her where I figured they were going but I decided to leave her innocence intact.
When the hell is the best time to explain things like this? I mean, sure, kids who live on farms know all about this stuff, but oh I don't know. I guess I just didn't have it in e to tel her.