I found an old turkey in the bottom of my freezer, it was frozen when I put it in there and it was still frozen when I took it out, it's been in there maybe 3+ years. After it thawed in the fridge for 3 days I was preparing it to go in the roaster and noticed an odd smell, not a sour rotten smell, maybe a freezer burnt smell. The skin wasn't stretchy and dry like normal turkey skin, it was kinda hard and had a greasy feeling, I figured maybe it was because it stayed in the freezer to long. I cooked it in the oven anyways to see how it would turn out, even when it was cooking it didn't have that smell like a turkey should have. After cooking I cut a little piece off and smelt it, still had that a little odd smell and taste. I'm not sure to eat any of it or not, could the turkey just have been a little freezer burnt or could the turkey gone bad somehow, I don't want to get sick if I eat it. Any help or advice would be greatly appreciated, thank you...