This cow is obese. She has an extremely fat brisket. Her tail head is buried. And there is no way of seeing her bone structure.

Her extreme weight will interfere with efficient reproduction. Often times when a cow is this heavy, it can mean that she is not milking well, has not calved, or didn't raise a calf the year before.

If there are many cows like this in the herd, this can be a sign that the nutritional program is not as efficient as it needs to be. This is why BCS is so useful. A producer can separate cows into different groups so that they all receive the proper and healthy amount of feed.