I found a decomposing mouse inside a bag of peanuts once. I learned that the law allows for a certain amount of animal parts in certain foods. I knew that I wouldn’t be “permanently traumatized” or anything so we took a ‘nuisance settlement’ (Me, being the nuisance...:) ). Pretty nasty, ‘though.
Speak for yourself, if that happened to me I could honestly claim permanent traumatization. I seriously would have a problem eating any packaged food after that.