Is it too late to start brushing an older dog's teeth?

An 8 year old dog that has never had its teeth brushed will benefit from starting today just as much as a puppy would from starting early, since ongoing plaque prevention matters at every age. The introduction process, tasting paste, then touching gums, then a brief brushing motion, works the same regardless of age.

If your senior dog has visible tartar, red gums, or bad breath that has been building for a long time, a professional cleaning first gives you a clean, healthy baseline to maintain, rather than brushing over a mouth that already needs attention beyond what a toothbrush can fix.

Senior dogs sometimes have less patience for new routines or more sensitive gums, so going a little slower, perhaps 3 to 4 weeks instead of 2, and using a very soft bristled brush, tends to work better than rushing the introduction.

An older dog that resists brushing more than the introduction process would predict may be reacting to existing tooth or gum pain rather than simply disliking the new routine, so if gentle, gradual introduction still meets strong resistance, a dental check before continuing training rules out pain as the underlying cause.

Many vets are happy to demonstrate proper brushing technique directly on your own dog during a routine visit, which can be especially reassuring when starting with a senior dog for the first time and wanting to get the approach right from day one.