More than 100 firefighters and 10 departments battled a barn fire Sunday afternoon.The call came in around 3:45pm for a barn fire in Dover.By the time the first crew arrived, the Shaw Road Historic Farm was engulfed.The owners tell TV 5 at least 100 chickens, two cows, and one cat were killed in the blaze. The Dover-Foxcroft Fire Chief Joe Guiotte said the fire started when two workers were unloading hay from a truck in the barn.He said a part in the truck malfunctioned and by the time the owner drove it out of the barn, it had already caught fire.The owners, Fred and Karen Cookson, said the house and barn are a total loss.Guiotte said “Nothing will replace that barn. It was 50 feet tall, if you could imagine a 100ft by 50ft tall, along 50ft wide. Just one of the old, tall dairy farms in the county.”The fire chief says the damage is estimated at $1.5 million. The owners are insured. Guiotte said it was of the largest fires he’s seen in 15 years.