Got Burp...I mean Milk?

As the girls sit down to eat cereal this morning:

Allie: "Mom, this tastes like burp."
Me: "What do you mean it tastes like burp?"
Allie: "This cereal has burp in it, I can taste it!"
Me: "Allie, it doesn't have burp in it, just eat it."

On second thought, I check the expiration date on the milk: 8/14/08. So it may taste like burp.
I tried smelling it, but I've had a chronic case of allergies since I've been here, so I couldn't really smell anything, which is probably a good thing since apparently it smelled (and tasted) like burp. And no, I didn't make them eat it.