I wouldn't be surprised. If cats have been able to get us to buy them cat grass to eat so they can barf hairballs and vomit onto the floor, frequently right after you just run the sweeper, that we then either step in, have to clean up and it stains the carpet so we don't get our deposits back if we rent. We basically pay a few buck for a product for them to ease their tummies which enables them to cost us hundreds of dollars less money we'll have if we rent and move out and for them to vomit everywhere which we get to clean up and often step in. They're way too clever!