We used teddy bears my pledge semester. The next year our province president came in and got rid of any animal mascot. That was the late 1980's. Now I've seen the girls use bunnies.
I didn't know that bunnies were considered a Zeta thing until after I graduated from college. I have always collected bunny stuff and now have a little bunny as a pet. He is gray, of course!
We had chocolate covered strawberries at pref and as our special treats.