Basically it's as simple as so much other behavior: Don't allow it to happen! With the ball on string wad the string up in your hand so your dog can only target the ball. With a tug do the same: wad the handles up in each hand and present the tug with your two hands at each end. Hard to do with a bite pillow the way they are constructed so practice with the tug until they learn to target the center. Back-tying with a strong harness gives you a good way to present it properly and build drive. When the dog is loose and you're playing you don't have control of when/how the dog bites the toy. If it's a puppy make sure the tug is not so big that they are looking for something smaller to get their mouth on. Start small and increase the size of the toy. From floppy rag to small skinny tug to a fatter tug to a bite pillow. Also never tug with teething puppies.
Dave Kroyer has a "free video friday" on teaching your dog not to bite the string.
If that link doesn't work, just google the words "Dave Kroyer dog biting string on ball". Since this is in his Free Video Friday collection anyone should be able to see it.
Dave Kroyer has a "free video friday" on teaching your dog not to bite the string.
If that link doesn't work, just google the words "Dave Kroyer dog biting string on ball". Since this is in his Free Video Friday collection anyone should be able to see it.