By Carla Thornton
Leaving the lower portion of a feather behind by breaking the featherís shaft, often close to the skin. The resulting look resembles stubble.
Bare skin, usually on the breast, that some nesting birds create by plucking in order to better incubate eggs.
Elizabethan collar, named after the wide, frilled 17th-century collar. Usually made of plastic and placed around a birdís neck to prevent it from plucking feathers or picking at wounds.
Grapefruit seed extract, thought by some to eradicate fungal or bacterial skin infections, which can cause feather picking.
Methyl sulfonyl methane. Dietary supplement for healthy connective tissues used by some to treat feather plucking.
Quaker mutilation syndrome, describing the frequent tendency of Quaker (monk) parakeets to progress from feather picking to self mutilation.
Breaking the skin, sometimes causing serious wounds that must be surgically closed.