My first thought was that the mum was pretty clued up, as she knew where the sewer went and tried the inspection vent before phoning the plumber.

She had (at least) two preschoolers to look after. No small task.

Bet it needed an even better wash when it was recovered.

And how many people would have just kept flushing? She is a humane and concerned person, IMO.

We saw the story on the TV here in NZ, including the film of the pup lying on it's back in the septic pipe, from the inspection camera.