Mentioned in The Wishing Spell, ch 10. No further description given.
Sir Henny Penny (character)
In Queen Red Riding Hood's Guide to Royalty, Red says Sir Henny Penny used to be her Secretary of Treasury, but she replaced him with Sir BaaBaa Blacksheep because Sir Henny Penny was "too much of a worry wart".
"Henny Penny" or "Chicken Little" (US) is a folk tale about a chicken who believes the world is coming to an end.