The most important job to perform is alleviate the pressure of the herniated disk on the spinal nerve roots causing the clinical signs. The area must be decompressed rapidly otherwise permanent clinical signs such as lameness or paralysis will become permanent. In less severe cases this will mean medical management that includes the use of glucocorticoids that will decrease the inflammation over the spinal root area. In more severe cases, a laminectomy is surgically performed by a specialist that removes a part of the vertebral "roof" attempting to alleviate pressures. Sometimes, this does not work.
Regardless of treatment, it is crucial that obese animals lose weight or the animal can re-injure the area again, which is never good. Animals must be confined and not allowed to catch frisbees or other types of activity. Walks should be limited. If away from the home, animals should be confined in a room or put in a crate or cat carrier. If an animal wants to sit next to you on a sofa, do not pick the animal up by its elbows facing you!! This puts tremendous strain on the spine. Using both hands support the dogs chest and abdomen underneath and gently pick the animal up. Animals will often not eat because it hurts too much to get into an eating position (prehension). Always elevate food and water bowls with a stack of newspapers or books so the animal can walk up to the bowls without having to stoop down.
Animals that are completely paralyzed may have a satisfying life if fitted with a special mobile cart on wheels that is strapped to the animals body. I have used such devices and it is great to see an animal not think about going over a curb with the device on. A recommended supplier of carts and other support products is K9 Carts.