Age of exploration dog breeds: dogs that sailed with explorers
See the real story – guest starring your dog.
You might picture your own dog trotting along a wooden deck, but the real history of exploration-era dogs is harder to look at. Spanish conquistadors shipped over strong, aggressive breeds such as bulldogs and mastiffs, and used alano-type dogs as weapons against indigenous peoples in the Americas.
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The story in 4 parts
A short version first. The full story, with every detail, is further down.
Part 1
What dogs actually traveled with explorers
One overview of the period notes that mastiffs and greyhounds also played a role alongside the alano.
Part 2
Dogs and the conquest of the Americas
Christopher Columbus is described as the first person to use dogs as weapons in the Americas.
Part 3
Dogs as cargo on the crossing
Columbus's second voyage left Spain in September 1493 with seventeen ships, around twelve hundred men, and livestock that included horses, sheep, and cattle.
Part 4
How Becerrillo's story ended
Becerrillo died in 1514.
Read the full story
Part 1
What dogs actually traveled with explorers
One overview of the period notes that mastiffs and greyhounds also played a role alongside the alano. The alano, also called the Alano Español, was a bulldog-type dog from the Iberian Peninsula.
His date and place of birth were never recorded, and historians can only guess whether he was born in the kennels of Diego Columbus or of Juan Ponce de León. By 1511, historical records already describe him with battle scars, and sources disagree on whether he was an Alano Español or a mastiff.
Part 2
Dogs and the conquest of the Americas
Christopher Columbus is described as the first person to use dogs as weapons in the Americas. Accounts say he released dogs against the indigenous people of Hispaniola in 1493 and against a group that tried to stop his landing in Jamaica in 1494. By 1495 he reportedly had twenty Spanish mastiffs with him, dogs said to reach as much as two hundred fifty pounds, and set them on the Arawak people with the command tomalos, meaning take them. Hundreds and then thousands more dogs followed in the years after.
Becerrillo was a war dog owned by Juan Ponce de León and used during the conquest of Puerto Rico. Becerrillo was trained to tell Spanish soldiers from native people, to track down people who had fled, and to fight in battle. One account credits him with killing thirty-three attackers in a single night battle that lasted about half an hour. He was fed the same rations as the soldiers and considered worth fifty men in the field. His son, Leoncico, is recorded as having gone with Vasco Núñez de Balboa into battles on the Isthmus of Panama in 1513.
Chroniclers describe the imported dogs as tools of terror, set loose on people who resisted Spanish rule. European chroniclers, including Gonzalo Fernández de Oviedo, wrote accounts describing dogs unleashed on entire groups of people who had no way to defend themselves. One account records Vasco Núñez de Balboa ordering a group of people to be killed by his dogs as punishment for resisting Spanish authority. You can find repeated descriptions of communities coming to see these dogs as something close to demonic, a fear that spread well beyond any single battle.
Part 3
Dogs as cargo on the crossing
Columbus's second voyage left Spain in September 1493 with seventeen ships, around twelve hundred men, and livestock that included horses, sheep, and cattle. That fleet reached the Caribbean, including Puerto Rico, in November 1493, and it carried Juan Ponce de León. So if you imagine your own dog on a ship like this, picture a working animal packed among livestock and weapons, not a pampered companion.
Part 4
How Becerrillo's story ended
Becerrillo died in 1514. Accounts describe Becerrillo pursuing attackers who had escaped by canoe, swimming after them through the water until he was hit by a volley of arrows and died. He was normally protected by a padded jacket, but it is not known whether he wore it that day. His handlers believed their opponents saw him as impossible to kill, so they buried him in an unmarked grave to keep his death secret. Accounts describe him being mourned by the Spanish troops, more so than some of their own fallen soldiers.
There is also a story of Becerrillo showing mercy, which sits oddly beside the rest of his record. An old woman was sent by Diego Guilarte de Salazar to carry a folded piece of paper to the governor, and he set the dog on her as cruel entertainment. She dropped to her knees and begged him not to hurt her, and according to the accounts, Becerrillo sniffed her, then turned and walked away without harming her. When Ponce de León heard what happened, he is reported to have said he would not let a dog show more compassion than a Christian, and he ordered the woman freed.
Things you might not know
- One overview of the period notes that mastiffs and greyhounds also played a role alongside the alano.
- Christopher Columbus is described as the first person to use dogs as weapons in the Americas.
- Becerrillo was a war dog owned by Juan Ponce de León and used during the conquest of Puerto Rico.
- He was fed the same rations as the soldiers and considered worth fifty men in the field.
Year by year
- 1493Accounts say he released dogs against the indigenous people of Hispaniola in 1493 and against a group that tried to stop his landing in Jamaica in 1494.
- September 1493Columbus's second voyage left Spain in September 1493 with seventeen ships, around twelve hundred men, and livestock that included horses, sheep, and cattle.
- November 1493That fleet reached the Caribbean, including Puerto Rico, in November 1493, and it carried Juan Ponce de León.
- 1494Accounts say he released dogs against the indigenous people of Hispaniola in 1493 and against a group that tried to stop his landing in Jamaica in 1494.
- 1495By 1495 he reportedly had twenty Spanish mastiffs with him, dogs said to reach as much as two hundred fifty pounds, and set them on the Arawak people with the command tomalos, meaning take them.
- 1511By 1511, historical records already describe him with battle scars, and sources disagree on whether he was an Alano Español or a mastiff.
- 1513His son, Leoncico, is recorded as having gone with Vasco Núñez de Balboa into battles on the Isthmus of Panama in 1513.
- 1514Becerrillo died in 1514.
Questions people ask
What breed was Becerrillo, the famous Spanish war dog?
Historical records suggest he may have been an Alano Español, though some accounts call him a mastiff.
Did dogs really sail with Christopher Columbus?
Yes, accounts describe Columbus using dogs as weapons against indigenous people in Hispaniola in 1493 and in Jamaica in 1494. By 1495 he is reported to have had twenty Spanish mastiffs with him.
Why did the Spanish conquistadors use war dogs?
They used dogs to terrorize indigenous communities and to help subdue people who resisted Spanish rule, since a dog attack could be brutal and fast. Trained dogs like Becerrillo were also used to track down people who had fled and to kill in battle.
How did Becerrillo die?
He died in 1514 after pursuing troops through a river and being wounded by their arrows. He was normally protected by a padded jacket, though it is not known if he wore it that day.
What happened to Becerrillo's puppy, Leoncico?
Leoncico was given to Vasco Núñez de Balboa and accompanied him in battles on the Isthmus of Panama in 1513.
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Sources
- Becerrillo - Wikipedia. en.wikipedia.org.
- Spanish war dogs. alanhuffman.substack.com.
- Becerrillo: The Terrifying War Dog of the Spanish Conquistadors. Ancient Origins Magazine.
- Hell Hounds: How Conquistadors Used War Dogs to Conquer the Americas. ColombiaOne: News from Colombia and the World, Nov 10, 2025.
- Dogs Of War: Canine Companions In The Conquest Of America - 16th Century | Weird History Facts. Weird History Facts, Nov 25, 2024.
- BECERRILLO, THE WAR DOG | History Anecdotes for Teachers. History Anecdotes for Teachers | History Anecdotes for Teachers - Making History Class More Interesting, Aug 28, 2023.
- Mastiff dogs were used as war weapons. (typau / Adobe Stock ) Becerrillo: The ‘Bull’ That Was Trained To Kill. molosserdogs.com.
- 1493 Detail - Columbus Second Voyage, Pre-Revolution Timeline 1400s. americasbesthistory.com.
- Christopher Columbus: The 1492 Voyage to the Americas — History Prime. History Prime.
Written by TimeWalkies EditorialLast updated How we research