Once we heard a washing machine emptying in the room at the front of our home. Only problem was that we didn't have a washing machine in that room.
On investigation, we found our big, lovable (albeit not high IQ) yellow Lab Max was vomiting great quanities of very clean, very soapy water. He had apparently gone to each bathroom, eaten a bar of soap from each, and then drank great quantities of water. [Soap always makes me thirsty ...]
Ah, Max. Sadly, gone now, but he lived a good long life and provided no end of "Max" stories. What a guy.