Do dental dog treats actually work?

High-trust community threads repeatedly point to the VOHC (Veterinary Oral Health Council) seal as the meaningful signal. Greenies and Virbac C.E.T. VEGGIEDENT are both VOHC-recognized and frequently described as vet-recommended in r/dogs and r/DogFood discussion. Reviewers stress that dental treats supplement, not replace, brushing, and several note they add calories that should be counted toward a dog's daily limit.