Bob Skinner kindly sent me the following link which reports on unlikely hybrids,though on this occasion there is a photograph taken in Georgia, U.S of a horse-deer cross. There is also a quote from the Edinburgh New
Philosophical Journal (1827) mentioning such a hybrid in Berlin and
Gerald of Wales mentions a deer-hybrid in the 12th century in his Journey
through Wales. .
bottom of the two links,above,is about jumarts, cattle crossed with an ass or
horse, including a drawing of one in France in 1766 and a photo of the skull
of one in the holdings of the French National College of
the who cat-rabbit hybrid debate, including videos.