This morning:
Audrey, as she walks over to Grace: "Good morning, Grace!"
Audrey stops. "Ew, what's that smell, Mommy?"
Mommy: "Gracie just tooted."
Audrey: "Did she poop?"
Mommy: "Yes."
Audrey pauses, and then exclaims, "Grace, who let the dogs out?!"
True story.