long time ago. It was good too. The last time I got one there was a hair in it though
Haven't had one since

Reminds me of my friend that said she ate some Steak n Shake chili and thought she bit into a mouse head. She still will eat the chili because she loves it but she takes it home and strains it first.
When do they come out, are they seasonal?
I guess it's seasonal. I've never had one but people were talking about it on a radio show the other day and most of them seemed pretty excited.
Every time I get to the McDonalds drive thru, I see so much goodness.

You don't seem like a McDonald's type Stella? 
Sometimes a breakfast biscuit (or 2)!
Stella only eats two bits and then leaves it!!
I wish! More like 2 biscuits!