You could try rubbing some dog toothpaste on her teeth with your fingertip. If that works for a while, you could progress to applying the toothpaste with a small piece of gauze. You could try a finger brush, but that might be too big.
A vet with a dental practice recommended some water additives for my senior dog who had chronically bad teeth and lymphoma. It sounded good, but I never got around to using it. I had multiple dogs drinking from the same multiple bowls in a hot climate, so it could have been unnecessary for them all, and maybe expensive. Something to look into, though!
You might ask your vet if your dog is currently showing signs of dental disease, and if so, what to do. I am not sure what the options would be. Maybe antibiotics to prevent worsening infection? Or "professional" brushing under sedation?
A vet with a dental practice recommended some water additives for my senior dog who had chronically bad teeth and lymphoma. It sounded good, but I never got around to using it. I had multiple dogs drinking from the same multiple bowls in a hot climate, so it could have been unnecessary for them all, and maybe expensive. Something to look into, though!
You might ask your vet if your dog is currently showing signs of dental disease, and if so, what to do. I am not sure what the options would be. Maybe antibiotics to prevent worsening infection? Or "professional" brushing under sedation?