Colloidal silver

Try colloidal silver.  The other suggestions for omega 3s and such are also good, as would perhaps many things that are also good for human back and bone conditions (collagen, aloe, MSM, silica, GTF chromium, red clover, glucosamine, chondroitin,  calcium, magnesium, boron, etc.)  Trust me though - try colloidal silver.  You may be quite surprised.  It helps regenerate and repair tissue and bones and has played an important role in relieving back and arthritis pain for many.  At any rate it will be good for your dogs to take, boosting their immune systems, preventing parvo and many other conditions, eliminating infection and restoring lost energy and mobility.