[quote user="ScruffyBoy"]Why do you think this happened to him, is it the arthritis that he has or is it that his muscles in his hind legs were getting tired? [/quote] This is a question for your vet and I suggest you schedule an appointment before you do much exercise. There could be neurological...

[quote user="BEVOLASVEGAS"]He has already lost a substantial amount of muscle[/quote] Both of these amino acids are helpful for muscle atrophy problems: L-Carnitine : http://www.b-naturals.com/index.php?main_page=product_info&products_id=20 L-Glutamine : http://www.b-naturals.com/index...

Both of these amino acids are helpful for muscle atrophy problems: L-Carnitine: http://b-naturals.com/product_info.php?products_id=28     L-Glutamine: http://b-naturals.com/product_info.php?products_id=145