Who am I?

The other day I photographed my Advent Calendar Nativity set. There are 24 pieces so it gets a bit crowded in the stable at the end! Most of the pieces are great but ...

... here are all the animals. Donkey, camels, sheep etc. But what is the white one in the middle supposed to be? It just doesn't seem in keeping with all the other pieces. I'd be interested to know what you all think it is! Try large for a better view.

p.s I think I like the camels best. What do you think?

UPDATE
Current votes are:-
1) a goat
2) a white ox
3) a depressed polar bear!