If you feed a beefalo before the animation for it eating has ended and you keep doing it over and over, the beefalo wont interrupt to fart and let you know that it is full. Unless you feed it, wait for the animation to finish, and then feed it again, it will overeat and never interrupt you until you stop feeding it.
Steps to Reproduce
Feed a beefalo non stop and note that when full it will not interrupt you if you continue to feed it unless you let the full eating animation play. This can lead to over feeding.
This issue has not been confirmed by a developer yet.