[Andrew Hackard]

A Wishing Ring will remove Chicken on Your Head.

There are some Curses and Traps that can't be removed with a Wishing Ring once they have taken effect, such as Antimatter from Star Munchkin. Their text will say explicitly that there is ONLY one way to get rid of the Curse/Trap effect. (Antimatter, for instance, says, "Nothing else will reduce or remove the penalty [once it takes effect], and there is no other way to get rid of the item.")