It is well known that mammals like horses and dogs develop psychiatry conditions such as depression. What are the other mental health conditions do the animals develop?
According to animal psychologists, animals can suffer from various mental disorders, though not in quite the same ways as humans. Apart from depression, they can develop other mental health conditions such as activity anorexia, thin sow syndrome, pica, OCD, addiction, stress, stereotypies, etc.
Have a look at this article: https://pubmed.ncbi.nlm.nih.gov/11199284/