Nine lives can restore their myelin lost.

http://www.sciencedaily.com/releases/2009/03/090330200722.htm

Researchers put these cats on a diet that progressive made the cat lose their myelin sheath that is need to ensure proper neural activity. When it is lost the cats have a weaken capacity to move and see correctly. When the researchers took them off the diet slowly but surely the cats regain their myelin sheath and their proper neural functions they had lost when they were on the diet. This is interesting because in Human beings we can't regain our myelin sheath. If Researchers can somehow coax the body to rebuild what we have lost in Multiple Sclerosis we can put an end to this autoimmune disease.