To the Editor.—
Recently, Rapoport1 reported successfully using clomipramine hydrochloride in treating dogs afflicted with compulsive paw licking (acral lick). This neurobiological approach not only benefited the animals but also provided a model for trichotillomania, believed to be a variant of obsessive-compulsive disorder.Preliminary information suggests that feather-picking disorder, a behavioral abnormality in birds, may represent an avian analog to obsessivecompulsive disorder in humans.2,3Feather-picking disorder in birds is a common problem for pet owners, breeders, zookeepers, and veterinarians.2,3 It has approximately a 10% incidence by consensus, although it has not been formally studied. In severe cases, the birds will become denuded and risk infection, hypothermia, or fatal hemorrhage if "blood feathers" are picked. This behavior, which can occur among any order or species, is repetitive, irrepressible, and maladaptive. Placing a plastic collar around the bird's neck is palliative, but the behavior usually resumes when the collar is