Severe alopecia areata and onychodystrophy on all four feet of a French trotter mare

ALOPECIA areata is an immune-mediated skin disease that results in a non-cicatricial alopecia; it has been described in various species ([McElwee and others 1998][1], [McElwee and Hoffmann 2002][2]) and it may occur in a circumscribed or generalised pattern ([Olsen and others 1999][3]). Apart from