It's Sydney's job to keep track of the cat litter and empty/refill as needed. The other day, after she had encountered some particular unpleasantness in the litter box, she felt led to share all the gorry details with her brothers---around the lunch table of course.
Sydney: Pixie (cat) must have had diarrhea or something because the litter box was GROSS!
Sawyer: Well, maybe she's constipated.
Payton: No silly. Diarrhea is when it all comes out. Constipation is when it can't come out.
I am so glad we cleared up that misunderstanding........