HGB Paul, strictly speaking those bears are not anatomically correct as polar bears, but your painting is just superb, CONGRATULATIONS!
And
FifteensAway is right on them being "floating" over the snow... Bears are heavy animals, and should touch the ground as such.
(the Copplestone one is a "real" polar bear, BTW... I suggest you to add one of two of them to your polar family!

)