Vet's Best comfort calm chewing tablets(60) Vet's Best calming tablets are made with quality natural ingredients (Tryptophan and Valerian Root) to help calm and relax your dog. Our product is veterinarian formulated for best digestion and absorption. Also, our dog supplement tablets are made in the USA with quality US and globally sourced ingredients. Vet's Best dog supplements have the National Animal Supplement Council (NASC) Seal of Approval.