Salt as you may know is one of the important building blocks for cattle. This, along with other minerals, are necessary for cattle to perform at their best.
An interesting thing about salt is that cattle have a natural “urge” to consume it. What this means is that unlike other minerals they will actually seek it out. If for some reason they are not able to find it then they will try to ingest it from other sources. This is when you will see cattle eating odd things such as tree bark, dirt, and even urine.
As I mentioned a couple of paragraphs earlier salt is very important for the overall function of cattle. Along with adding in milk production it will assist with other functions too. These functions are things like reproduction, blood flow, and even sweating. Though I am pretty sure that last one should be pretty obvious.