The link doesn't work, what's the spray by name? If it's pick-no-more yes it should work, however it does need to be applied frequently in order to do so.I ordered blukote but it won’t be here till next weekend. I also ordered This spray that’s supposed to reduce cannibalism. Anyone ever try this?
Once you get the blukote you might want to try doing as LaFleche suggested and spraying it around so everyone has blue butts.
Both pick-no-more and blukote can stain so I highly suggest gloves and clothes you don't mind getting stuff on!