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This forum is for questions and support regarding your horses and other large pets!
I found 3 excellent websites that give all the causes of hair loss in our kitties. the latter 2 sites have many photos to show dermatitis and food allergy reactions.
www.peteducation.com/article.cfm?c=1+2141&aid=195
www.ivis.org/proceedings/hills/felinemed/hill1.pdf