The dog always pees on its legs. It may be that the catheter hairs are too long or in an improper position. The catheter hairs need to be trimmed, but they must not be cut short. At the same time, the dog must be guided to urinate correctly. If your dog still pees on its legs, you need to take your dog to the pet hospital for examination to see if there are urinary tract diseases, such as urinary tract infection, urethral obstruction, etc., to avoid delaying the condition.