Do you know some animals that have horns? How many horns do they have? Most horns are hard and strong. Some animals use their horns to stop other animals from fighting with them. Which ones can fight with their horns?Do you know some animals that have horns? How many horns do they have? Most horns are hard and strong. Some animals use their horns to stop other animals from fighting with them. Which ones can fight with their horns?