Not all groomers offer the brushing of an animal’s teeth as part of their regular service, as technically it’s considered ‘medicine’ and is the job of a certified veterinarian. However, many pet owners will ask for the service, or something similar, if chew bones, etc., aren’t working to keep a dog’s teeth white and healthy.
I personally don’t particularly care for the pre-filled toothbrushes. They don’t have enough paste in them. I like the latex gloves with the brush on the index finger. I rarely have dogs that fight it. Just BE CAREFUL: I had a dog with teeth that were bad and the gums bled a little and the owners freaked. I asked my vet about that and he says you have to be really careful because if a tooth comes out or any plaque comes off, they can have a case against you for “praticing veterinary medicine without a lisence.” Stupid. I know, but just the same, I now only offer a spray on dental rinse. If you do decide to offer this service, make sure the client is aware of any ‘risks’ so they aren’t surprised by a not so perfect result.