Is there a word (noun, verb, adjective -- I don't care which) that describes the quality of being overly defensive of little things?
For example...
Dave: God, Alicia gets hostile when I ask for a little piece of candy, and she guards her stash of pencils like a bulldog.
Jane: Yeah, and she has so much candy and so many pencils anyways!
Dave: She really is ___________.
Thanks so much!