I do n't want to feed Bert food that he knocks on the floor . I worked in the food industry and am kind of OCD about hygiene . She insisted that I would and that , despite my claims to good hygiene almost to an obsession , she 'd seen my apartment in Portland and I could never care about hygiene .

Based on the preceding passage, answer the following question What may have caused you not want to feed Bert ?
He leaves a mess when he eats .