Vaccine reaction from November is highly unlikely - and autoimmune even more unlikely. Did you look into getting the Ontario Dehy cubes either from one of their distributors or Triple Crown?  You may need to replace all his hay with softened cubes.

Agree with pergolide increase. The insulin isn't normal but it's not in acute laminitis range either.
--
Eleanor in PA

www.drkellon.com 
EC Owner 2001