If your dog simply hates this activity even after the acclimation period (give it at least a month before giving up), there are other options though t...
Step 4: Add toothpaste and increase duration
Using a small amount of toothpaste on your brush, lightly brush your dog's teeth, paying special attention to the back molars where tartar builds up readily. The inside of the teeth does not accumulate as much tartar so it is most important to brush the outside surfaces.
Work up to brushing for 30 seconds on each side of the mouth.