Any suggestions for good chew toys for an exceptionally hard chewer?
My Border collie is an amazingly hard and persistent chewer. She can destroy a plushie chew toy in seconds. She doesn't much like to chew on a Kong unless it's stuffed with a treat. Rawhides get bitten up into smallish pieces which are then swallowed. The Nylabone extra durable seems to work fairly well. I'd like to get her a couple others that she'd like that will last longer than 30 minutes before it's gone. Any ideas?