Forum:Method to get pet past a pit in the floor?

I've got a problem in the mines. The map of one of the floors consists of two halves, connected by a single-tile hallway. On one side is the stairs up, and on the other is the stairs down. I'd like to continue exploring the mines, but there's a pit trap in the middle of the hallway, and I can't get my pet over it. Are there any good methods of doing this besides polymorphing the pet into something that can fly or tunneling a new hallway?