My FIL told me of a therapy dog, a yellow lab female, that visits at the hospital where he works. The other day he was in the rest room washing his hands and the guy with the dog came in. FIL thought the guy had to use the restroom. Nope, the dog did. He had taught the dog to potty in the toilet. My FIL was so amazed he forgot to ask the guy how he managed that. He said the next time he sees him, he'll ask all kinds of questions. Can't wait to hear the answers. I thought it was so cool but very odd.