They do know what a snowplow is, apparently, because the comment makes them snort a little with exasperated amusement. Aziraphale did make snowshoes, but they're too heavy even for those. (Damn arm. Useful arm. We manage okay, Sergeant.)

The question makes them duck their head a little, though. "Thought you knew," they say with some shades of embarrassment. "Took a bowl up to him, while you were eating. Sorry."