eli5: Do animals have to deal with complex mental disorders (like bpd and schizophrenia)?

Question

I know some animals can have depression and anxiety, but those are pretty basic disorders compared to stuff like By Proxy. Do animals deal with this stuff or are their brains not big/advanced enough?

In: Biology

Answer 1

I know a lot of zoo animals exhibit strong signs of psychosis (bored out of their gourds, small enclosures, stress, unnatural environments, etc.)