What is the most unusual (but viable) hybrid animal?
Well that all depends on what you mean by viable. If you mean that the offspring lives through birth and beyond, then I would have to say the oddest mix I ever saw was a coon/cat. It was born to a female cat a friend of mine had, my friend THOUGHT it got into a fight with the coon, and was quarenteened for a couple of weeks, they found out she turn up pregnant, and the thing that was born was kinda weird looking. The muscle structure was a lot like a coon, but the range of motion was restricted, and it didn’t have “hands” the way a coon does. They ended up having to put the animal down when it started reaching maturity, because it was VERY agressive, and attacked just about everything that came near it. If you mean by “viable” , an offspring capable of producing offspring (not born sterile) then the oddest mix would have to be a Liger, which is a Lion/Tiger hybrid, with the Lion as the father and Tiger as the mum.