Ok, I am no help here what-so-ever, but I have to share...
A few years ago the remnents of a hurricane blew through in late September and blew all the over ripe apples off the tree into the alpaca pastures. One particular alpaca ate waaaay too many during the night and was falling down drunk as a skunk the next morning.
I suspected that, but called the vet anyway in case there was indeed an injury or something neurological going on.
It took four full days for it to wear off and he staggered around the whole time. I can look back on it and laugh now, but it was very serious then, on top of having no electricity for 8 days.