Love it! Although I hope that's not a prediction that I might have a vermin problem in the future, now that I've partaken!
This was a rhyme we sang as children, about Cawl:
Davey Rees, Cawl Pys,
Dalla chwannen yn ei grys.
Translation: Davey Rees, Cawl Peas,
Catching fleas in his shirt.