My own chickens eat all sorts of vile stuff with no harm. Of
course, they don't see it as vile at all. Yum, gulp, down it goes. They'd take those peaches and devour them.
I could list some of the rotted, mold ridden, maggot infested stuff they've eaten, but heck, you could be eating breakfast right now and lose your appetite. But take my word, they will eat old stuff without much problem. In fact, they prefer blackened, moldy, half rotted pumpkins over fresh ones. Many people have fed chickens using giant compost piles into which are added goodly sums of very nasty garbage. The chickens do fine.
And do chickens get drunk? They appear to. I've never seen it, but my uncle got in trouble as a child for mixing beer and liquor in the chicken
feed just so he could get the rooster drunk. The family story says that he was successful.