I once got a handful of weaners drunk, quite funny really.
My boss always raised a few, and she helped out at the local show, where she got all the dregs from the beer tent.
Two old fashioned milk churns full of leftover pimms/beer/whatever else came into it arrived next to the pig pen.
She told me to give it to them, but hadn't specified she wanted them to only have a little for the next few days, so I poured the lot in.
Came home later in the afternoon to some drunk pigs lying around sleeping it off!
They seemed none the worse for wear, but I wouldn't recommend it lol