It is normal for your dog to lick everything in the house, including the floor, carpet, and furniture. They are doing this for a reason. Dogs are clean animals and they are constantly looking for any bacteria, or microbes in their environment. Dogs have a sense of smell that’s far better than ours, so they can smell when the floors or carpets are dirty and they lick it to make it clean.   Dogs also know when they are sick and they lick those areas to make them feel better. When your dog is licking the floor over and over again, it could mean there is something wrong. If your dog is licking the floor more than normal, it’s a good idea to take him to the vet to make sure there isn’t a medical reason why they are licking the floor. Their vet can give your dog a checkup and find out any medical problems that are causing your dog to lick the floor.