I just wanted to check back and say that I've been browsing and reading about the Presa Canario, I had heard of Canary Dog but was unfamiliar with its true name of Presa Canario. The breed standard states:

The essential characteristics of the Presa are those which enable it to drive and hold cattle, and to guard its home and family. These tasks require a powerful, agile, courageous dog with a large head and powerful jaws. The Presa is extremely affectionate, docile and well behaved...
I was very impressed with all that I read about this amazing breed. Thanks to Senorita and her loving family for helping me learn about this spectacular breed!