Although donkeys make sounds that might sound like laughter, donkeys do not actually laugh, these sounds represent a form of warning among donkeys of possible danger in the surroundings.
In another sense, a donkey showing its teeth in a way that looks like a smile is also a characteristic behavior of some animals called Flehmen’s response that has nothing to do with what is understood as laughter.
In the particular case of the video I mentioned at the beginning, it is obvious that the abrupt reaction of the dog, together with the loud barking caused great fear in the donkeys.
Naturally, you can see that the braying donkey is frightened, while the others are moving away from the fence.
https://animalworldfacts.com/do-donkeys-really-laugh-short-answer/
