My mom had a quart of milk that went a little sour. She was going to use it for choc. milk. It got more sour... she was going to use it for baking or something.. It got more sour and I suggested we use it a spackle Well, in the fridge it sat, unopened but bulging. I was scared to death to open it and pour it down the drain. I was chatting with a chicken expert friend of mine, Gardeninggranny, and she said I could just give it to my chickens. I took it outside and opened it carefully and expected a solid mass of worst smelling goo.... well, it actually didn't smell 1/4 as bad as I expected and it was mostly liquid... I was pretty shocked. They were confused at first and stood there looking at it for about 3 mins. Then my RIR took a little taste and started going after it. My Delaware went up to her and tasted a drop off of the RIR's beak and then she went after it... from there it was a free for all.