Trying to find an old animation short about two bear cubs in a world of glass?

Its been over twelve years since I last saw it, probably more, and I think it was an older film the start with.

-It was about two bear cubs who lived with their mother in a paradise 'a land of milk and honey'
-One bear was pink and the other blue
-They wandered into a world made of glass
-Their mother told them never to wander, but they did
-They met a pair of foxes
-The fox cut the cubs roll of cheese for them, cutting it over and over again pretending to be making them equal sizes, but eating the pieces they cut off
-Then the world shatters
-They grow up and wander around looking for the world/their mother, but never find it
-It was probably around half an hour long

It would mean so much to us if you know what this animation is called, or where to find it, online or otherwise.

Thanks,
Alaiuh