That is the very reason I have not tried that spray with Cayenne pepper. Years ago I did just sprinkle white cayenne pepper on the pea plants cuz the bunnies were nibbling them down to about 1/2 inch tall! The first time I said, 'oh there is no water for a couple miles so I just cant be that mean.' The 2nd time they did it to both the bean plants and the pea plants, I said "thats IT!@!!!" Since that did not have any wax with it, it washed off easily but heck a small can of white pepper is cheap! I did actually then get peas and beans from the plants!
I think the fox and bobcat stuff are sort of interchangable. My stuff helped quite a bit but I did have to put some more down last week cuz they were getting interested again! I will say I have gotten many more tomatoes, although sadly I think the cherokee purple and the black krim both did not work out at all well!!