Plot hole: It would have taken much longer to build the 54 acres of homes than the animals hibernated, so there's no way they couldn't have known what was going on around them.
Plot hole: When the animals awake from hibernating, the trees are full of leaves, as if it was summer instead of spring; plus, flowers wouldn't pop out of the snow fully germinated, especially since the snow would be all melted by the time the tree leaves fully grew.