Envirofresh chew deterrent spray helps discourage your dog from chewing, scratching or sitting on furniture. Its taste and smell are unpleasant to dogs, so they learn to link those spots with a bad experience. • Advanced 2-in-1 formula, taste and smell • Use on furniture, doors, rugs, wood, metal and plastic • For indoor and outdoor use • Simple and easy to use A handy helper while you train your dog.