Oh. You mean a mental illness or a psychiatric disorder. "Mental" sounds like something from 1950, if you'll forgive me.

I think it's very odd that the child ate what she ate. True, she was young, but like Betty said, even a toddler will not eat its poop, etc.

Eating or spreading one's own feces on walls and floors and that kind of behavior in general is not an uncommon behavior for people who are severely psychotic. It is something nurses and doctors see in psychiatric hospitals not infrequently.