Several fire stations responded to the barn fire at around 4 p.m. in the area of Line 12 between Sideroad 3 and Wellington Road 14 near Arthur, Ontario.
It is feared that the cattle loss could be significant, despite the efforts of neighbours working to help remove the panicked animals to safety.
The fire service is guesstimating that over 100 cows were killed.
Although unable to provide specifics, fire officials believe that the fire started somewhere in the hayloft.
The fast-moving fire caused a corner of the barn to collapse within 10 minutes of the arrival of fire services, with the entire building collapsing soon after.
With the loss of animal life and the barn, the cost of damages could be in the millions of dollars.
Every year, incidents of fire are reported. Farms.com has previously written about methodologies to help protect yourself and your properties.
Please read a recent article re: Fire Safety Measures for Smooth Harvest Season.