I used to ride a horse, an ex-racing Quarter Horse, that LOVED beer. He would stick his head out the stall door and whinny if he smelled any (and he could apparently smell it at 50 yards, with the cap still on the bottle).
I asked my vet if it would do him any harm to give him some. When she stopped laughing, she said as long as we didn't set him so drunk that he fell over, it was probably good for his digestion.
So we would wrap a leg bandage or a towel around the neck of the bottle and tip it on up, and Mister would glug a couple of glugs and it was gone!
We hired a car and driver to show us the sights of Mexico City many years ago. He stopped at a market the featured a beer driking mule. For 4 Pesos, I set the opened beer bottle on the ground in front of the mule. He picked it up and drained it and would do it over and over...