You should first try cleaning the couch to remove any food or residue on the couch with a pet-safe cleaner and to stop eating/drinking on the couch altogether. If the licking persists, you can try offering your pup chew toys, lick mats with peanut butter, or puzzle toys to keep them occupied as a distraction to help deter the action. If your dog licks due to anxiety, try calming treats, pheromone diffusers, or a comfy dog bed as an alternative.
