What cow has the biggest horns?

The Ankole breed have the largest and most impressive horns of all cattle. There are 5 strains of Ankole cattle: Bahema, Bashi, Tutsi, Kigezi, and Watusi. The Tutsi strain of Ankole cattle have the largest-sized horns of all Ankole-type cattle, however the most well-known strain of Ankole cattle are the Ankole-Watusi, which are called the "kings of cattle" because they are an ancient breed with ancestry tracing back to at least 6,000 years ago.