It happened around 1 a.m. on the 1800 block of Beaver Dam Road in Honey Brook.
Images showed large flames rising from the milking area of the barn.
At one point, firefighters say the blaze was through the roof.
Tanker trucks were connected to a nearby pond to supply water and the fire was placed under control.
The animals inside the barn were moved to a safe location.
There are no reports of any injuries.
------
Send a News Tip to Action News
Learn More About 6abc Apps