How to tell if it's been raining all day

You come home to muddy footprints on your floors. Your dog is chasing his tail in the middle of the living room (at 3 years old!). You have toys dumped in your lap every time you sit down. Small furry noses intrude into any activity you attempt to do below waist level. AND the dog runs past you at warp speed carrying his latest treasure - your dustpan! (All the while watching you out of the corner of his eye to see if this latest gambet will convince you to play 'keep away'!)