A New Panzerism

How fast can a can run?Panzer says:

Some of my favorite memories from kittenhood go back to those times when Mom and What's His Name would come back from the hunt.

They'd bring in cans of food for me and other stuff for them.

Then we'd all sit around by the glow of the TV

and ...

Mom would recount how much the food was on sale.

Whatever that means.

I'm not really sure, but I think sale means how fast the prey runs.