I was curious so I started doing some searching.
Christopher Columbus brought chickens to the Caribbean on his second voyage in September 1493. I think he arrived in 1494. So we can say chickens have been in North America for more than 500 years. There were already chickens in South America from trade with Polynesians who brought chickens in canoes. So Polynesians landed before Columbua. Also, the Viking Leif Ericson and his crew landed in what is now Newfoundland, Canada in about the year 1000, which is almost 500 years before Columbus. They built a camp and spent a winter there. Vikings from Iceland and Scandinavia lived in Greenland (not part of North America but considered part of the "New World") for about 450 years before a mini ice age starved them out in the mid-1400s. Vikings kept chickens and geese, but I do not think that any of them were left behind. So because the Vikings left before Columbus arrived, Columbus gets the credit. Columbus never set foot on the mainland of North America, and starting with his first voyage he took Native Americans as slaves back to Spain. Columbus did not do anything to celebrate. He wasn't even the first European in North America. It is clear we should not celebrate Columbus Day.
The colonists of Jamestown, Virginia brought chickens in 1607.
And the pilgrims in Massachusetts landed in 1620 with chickens. "They probably brought goats, pigs and chickens on
Mayflower in 1620
. Cows and sheep came a few years later."
Chickens always seem to be the first livestock to arrive.
If you look around the world, once animals like goats and pigs are released, they go wild and are very difficult to eradicate. Chickens go wild also, but I do not think they are as difficult to eradicate.
Here is a picture of a Viking house on Greenland.