Have you ever noticed your dog suddenly have problems walking? While this can be very scary there are many reasons that your dog has suddenly started walking differently. A back disease is one of the most common reasons that small dogs will suddenly start to have trouble walking. If you notice any of these problems, take your dog to your veterinarian immediately for medical care. There are many things that can be done to help your dog walk better but the sooner you start treating your dog the quicker and easier the recovery.