Rats feel empathy for other rats, unless they're on antidepressants

Rats care about their rat buddies — unless they’re on antidepressants, it would seem.
A 2011 study found that when a free rat came in contact with a rat trapped in a container, the free rat was empathically motivated to release the distressed rat from its cell. But a new study, published in Frontiers in Psychology, noted that a rat put in a similar scenario but given an anti-anxiety medication, was less likely to free its trapped peer.
Both studies were led in part by Peggy Maso