Donkey fighting is a behavior that can arise due to a variety of different issues. Donkeys are naturally territorial animals, so if there is not enough room for them or they don’t feel secure in their environment, they may start fighting with each other as a way to establish dominance and territory. Additionally, two donkeys may fight for the attention of another donkey—especially if one feels threatened by the presence of an outside animal such as a horse or goat. If your donkeys have been castrated recently and are still experiencing hormonal changes, this could also be contributing to their aggressive behaviors. It's important to provide ample space for all your animals and ensure that everyone is healthy and feeling safe in order for them to get along peacefully.