Drake has 2 of these as well. He loves it. I do not know how well it cleans his teeth, but let me tell you about this bone that has worked wonders.

In May, Andrew's parent's had to take care of Drake for about 2 months while Andrew and I were moving and getting settled in. They didn't brush his teeth everyday like I do, so some tartar formed on his teeth. We were planning on taking him and getting them clean.2 days before the procedure, Andrew got Drake a "Knuckle". It was the grossest looking thing. Looked like a big joint! Drake loved it. He wouldn't part with it! After chewing on it all night and diminishing the size of the bone to about quarter of what it was, Drake's teeth were pearly white! No tartar no nothing! We tried the "Knuckle" on my grandfather's 3 year old GSD who has never had his teeth brushed, and his teeth are white as if her were 6 months old!

Try it!