"Working Dogs" joke

Three guys sitting in a bar around a log fire with their dogs and get talkin' about them.

First one says "My dog is called woodworker.. go woodworker."

The dog grabs a log from fire and with his teeth and paws fashions a beautiful figurine.

Next one says "My dog is called stoneworker.. go stoneworker"

The dog drags a rock from the fire front and a beautiful carving emerges.

Third one says "My dog is called iron worker" he puts the fire tongs into the fire and gets them red hot. "Now," he says "I'll just touch him on the balls and you watch him make a bolt for the door."