it is well documented that many animal herds have an outsider. Animals may look simple to us, but like us they still use a lot of body language- even more than us actually as they dont have the speech capabilities we have- and their social structures are built on 2 things- the ability to groom other animals and/or get along with them, and asserting of dominance.
I cant see why it cannot be possible that animals are born with differing abilities to decode body language, or behave appropriately for their species.
I have read about wolves being shunned from their pack, and having to walk around by themselves. Also, I read that of dolphins that hang around human populations at beaches, many do so because they are different from their pod.
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"Caravan is the name of my history, and my life an extraordinary adventure."
~ Amin Maalouf
Taking a break.