answer:It varies wildly with individuals. Some pets need annual prophy, some never do. Feeding dry food, and (if you’re up for it) brushing will help slow the progress. Feline dental cleanings are usually pretty simple procedures – they don’t have anywhere near the same amount of tooth surface as dogs. But they’re worthwhile; advanced dental disease can cause organ damage. Bacteria from the calculus enters the bloodstream through inflamed gum tissue and can lodge in the heart, kidneys, or liver. Doesn’t sound as if Milo is anywhere near that severity of disease, though. (Dental prophy was always very satisfying – instant gratification. You start with nasty, yucky teeth, and then 20 minutes later, shiny white!) How old is he?