Susan K - you have it almost EXACTLY how I learned it from my brother's friends as a drinking game:

One hen
A couple ducks
Three Brown Bear
Four Running Hare
Five Fat Females Fixing for a Fight
Six corpulent porpoises
Seven sheet slitters: I slit sheets upon a slitted sheet I sit
Eight ??
Nine ?
Ten fig pluckers plucking figs; I am not a fig plucker nor a fig plucker's son but I'll pluck figs until the fig plucker comes.