Purina has a dental formula, but it got a bad review: http://hubpages.com/hub/Purina-Veter...at-Food-Review

My guys love Hill's Dental....you could mix some in with the Purina you use now. Even better, use it as treats.

Other good treats - MediTreats from your vet, Greenies.

Ask your vet about this. It's a bit more money - but think about how much a dental cleaning costs! Maybe ask to try this for a while before your kitties get checked for a cleaning.

Also, these are in Canada (happened to be the first link I chose), but you can find similar stuff in the US:

http://www.cat-supplies-canada.com/n...-103-prd1.html


http://www.cat-supplies-canada.com/p...-124-prd1.html