When I was taking my puppy out my son reached to cocoa powder off the table and spilled it everywhere, I didn't even notice it until the dog came out from behind the chair with lab) it was a huge mess.
Like when I dropped a full container of sprinkles on my kitchen floor - I wouldn't doubt the people who bought my house found more under the fridge and stove! LOL! You have to love kids and pups - it's a lot of work, but you will laugh about it later!
Hey, at least you can blame your son. Last time there was a cocoa powder "incident" at my house, it was my fault.