Teeth cleaning is always something to be considered when dogs go under for another procedure. But it’s rarely a necessity for younger dogs, and even for older dogs, it’s not always required. It’s a pretty standard upsell that vets do, and you shouldn’t feel obligated. You’re not dismissing your dogs needs if you skip it.
If your vet pushes it, make him/her show you why your dog needs it. Sometimes they really do.
