1. Maybe we evolved as a hunting pack animal.

2. A mule is usually used as a pack animal.

3. I can't over emphasize how important that is to a pack animal.

4. Burro definition is - donkey; especially : a small donkey used as a pack animal

5. What does Burro mean? A small donkey, especially one used as a pack animal

6. Burro definition, a small donkey, especially one used as a pack animal in the southwestern U.S

7. The findings throw fresh light on the camel's former popularity both as pack animal and military mount.