User blog comment:HazelQuill7445/Awesome fan art/@comment-5717877-20180130001900/@comment-34633327-20180130030647

As Glynda said "He's always drunk", so you don't have to imagine a drunken bird form, all his bird forms are drunk.

Probably for the best, with the Emotional Fragileness of Tai when Raven left and Summer died, he'd probably be a worse alcoholic than even Qrow had he the chance to touch the bottle. Though this also makes me think Qrow keeps taking it and hiding it long after Tai was at risk, and justifies it as just being safe.