Stupid vets. It is probably berries from a tree like a banyan. The berries ferment and they can get drunk. I have see it with doves and other birds near banyan trees.
I see the same thing with the mulberry trees in the backyard. Birds and squirrels get loaded and fall off the branches every Fall.
Yep.
We had berry trees in the enclosed quads of our high school.
At lunch, we’d watch the birds get drunk and then SLAM! into the windows.
Good times.
I’ve seen flocks of robins and also bluejays flying crazy, falling onto the lawn, flying into each other, but seeming to be having a great time. They were eating fermented elderberrys.