On Mon, 15 Dec 2008 18:48:44 -0500, Boron Elgar
> wrote:

>On Mon, 15 Dec 2008 11:57:56 -0600, Melba's Jammin'
> wrote:
>
>>In article >,
>> Damsel in dis Dress > wrote:
>>
>>> Speaking of those dates ... I have a tub of plain yogurt in my fridge
>>> that's marked November 17 (this year). It's partially used, and I
>>> just discovered it with the lid bulging. It did the phooosh thing
>>> when I opened it. Time to toss it, or is that just a yogurt thing?
>>
>>Me, I'd toss it. I've had old yogurt and it didn't raise the lid.
>>Any fur on it?
>>
>>OTOH, if it's a 'natural' product maybe that's typical action. I'd
>>still toss it. And buy a smaller container next time; one that'd be
>>used all at once. It's not a better buy if you wind up tossing half of
>>it.
>>
>>> Carol
>
>
>As a friend of mine used to say, "What can happen to yogurt when it
>turns that hasn't happened already?"
>
>He was braver than I, though.
>
>Boron

It can grow black and green fuzz. I just tossed some that had.
Buttermilk that has gone bad does not smell like regular buttermilk.