"Then he will be as stubborn as an old mule, just out of pride."

Immediately surrounded by photographers, the horse walked at about the pace of an old mule.

I had an uncle once who found an old mule on the point of death.

That might take a year, but old mules are patient.

I know a stubborn old mule when I see one.

As easy as kicking an old mule in the buttocks.

Now I'm like an old mule who still goes to the pump.

"That's one of our recruits," said the old mule to the troop horse.

This is the toughest baseball fight ever, humbling for everyone, even a stubborn old mule like Green.

"Pair of old mules is what we are," she said comfortably.