My basset finds it entertaining to chew on anything and everything. I just bought new leather shag area rugs, and these have become his new chew toys. As soon as I got this bottle, I tested it on one of the loose leather strands. It did not change the color, so I sprayed the entire rug. He tried chewing on it, but didn't like the bitter flavor. He has left them alone since. The only thing I do not like about the spray is it burns my lungs when I spray it.