Moira was diagnosed with environmental allergies last year. She lost all of the hair on her underside,her tummy was red and inflamed, she itched so bad she had open spots on her legs. Finally I found the one elusive flea. Moira is allergic to fleas, not grasses, detergents, etc. Not a fun allergy to have, but maybe more easily avoided than other things. Let's hope the Vectra D works this year.