Fecal Matters  is episode 10 of family guy season 19. It was originally aired on January 17, 2021.

When Peter makes it through a bad flu season without getting sick, the hospital asks him to volunteer as a nurse, but he finds himself at a crossroads when his mortal enemy, The Giant Chicken, is admitted to the ER. Meanwhile, Brian receives his genetic test results and learns he is part cat, causing him to have an identity crisis.