After using this product for 20 days I have come to find out that they do work great on humans, as it has stopped my gals constent snoring that keeps me awake into the wee hours of the morn, but when I applied them to Princess she didn't seem to stop the snoring, she only licked herself and fell asleep on my head, which is very warm in the summer months, but the winter is coming so that is nifty now :).