Aristopet Stop Pick Spray contains Denatonium Benzoate, an intensely bitter tasting substance to aid in treatment of feather picking in parrots and other cage and avairy birds. Feather picking is characterised by the loss or damage of feathers on the body and neck with normal feathers on the head. Feather picking can be the result of many underlying causes including nutritional deficiencies, parasites (mites and lice), bacterial, fungal or viral infections, psychogenic problems such as boredom, stress, sexual frustration, etc. The underlying causes must be addressed to eliminate the problem. For example: remove environment stress, and in the case of boredom provide toys and entertainment when the bird is alone (radio or television). If problems persist, consult an avian veterinarian.