What Is Your Dog's Favorite Toy?

My dogs were all obsessed with this stuffed porcupine toy that would make fart noises when you squeezed it. We must have gone through 15-20 of those things when we had our dogs. They wouldn't play with anything else but those. It was like some challenge to get the sound device out of them or something.

The only other thing they loved were those compressed dark green dog "bones". We had to stop getting those for them though because they were making their gums bleed.