Ceramic bowls are generally safe for dogs if properly constructed and glazed. If not correctly applied, there’s a rare risk of lead poisoning from glazes or decorative paints.
In addition, ceramic bowls can break easily. If your dog tips the bowl over or moves it around the room, the brittleness of the earthenware likely won’t last very long. So, you want to be cautious so that if the bowl breaks, your pet doesn’t accidentally ingest a piece or get injured by a sharp edge.