Heather L.’s Mabel is a 13-year-old Pembroke Welsh Corgi with Degenerative Myelopathy (DM). Mabel showed in rally obedience and agility until January of 2011, when she started to show symptoms of DM. Recently, Mabel began to drag her left hind leg. At first she resisted her cart, until she found out how much easier it was […]