Using a hay bale to supplement your cattle is a tried and true method that many producers use. It is reasonably priced compared to other feedstuffs. Though just like other feedstuffs the quality can vary depending on many different factors.
While looking at using a hay bale many people tend to just look at the upfront cost. While this may be good initially it is not always best to be the only way. You will want to look at how much that particular will cost per unit of energy or protein.
Like with other feedstuffs it is always a good idea to break the price down into these simple units so you can compare apples to apples. This is because though a hay bale may look to be a good deal initially it may not be really. Once you have broken down the price into those units you will find it will actually cost you more.