As a biology student I can tell you that you are most likely correct :-) Behavioural studies in animals are a fascinating field. I can't back it up with citati

As a biology student I can tell you that you are most likely correct :-) Behavioural studies in animals are a fascinating field. I can't back it up with citations right now, but I'm pretty sure horses and dogs are not the only animals to read human facial expressions. Chimps, cats, parrots - you name it - if it's been in close contact with humans for any length of time, I wouldn't be surprised if it learnt how to read our emotions.