it's possible that that someone put another head on the body.
Heads and bodies within the same size and company are almost always interchangeable.
It's also pretty true for any same size doll from any company (like I have a luts head on a fantasy doll body, and a migidoll head on a soom body - all SD sized though)
But in the case of resin soul and bobobie (not really sure what their deal is, they sell all the same dolls, resinsoul just has a double jointed body, and seems to be a slightly better quality), their dolls tend to run smallish, and rather thin, and their bodies don't often look good with other heads (extreme bobbleheaded-ness, etc)
However, they're the only company that I know of that is in the 200$ price range with a hooved.
If it was a child like one, then that would broaden the search a bit, but Im pretty sure what you saw was a resinsoul/bobobie
and i know someone in the dollhouse has one and posted it awhile ago.