How long do they keep in the freezer?? I have been emptying mine ready to defrost it (hasn't been done since I bought it 2 years ago) and I have come across a pack of organic free range chicken livers. They must have been there since the freezer was loaded up from new - so almost 2 years old.

I'd hate to have to throw them, and wondered if they'd still be OK to make some chicken liver pate?