I have four rescue dogs. Three are Border collie mixes, and one, half Welsh Corgi and half German Sheppard. After dinner every night I give them each a dingo donut and tell them, oaky now, it’s time to go brush your teeth. My Vet is very impressed at how clean their teeth are, even the 12 year old. I have recommended these products to several of my dog loving friends. This is much safer than anesthetizing your family member just to have a teeth cleaning.