UPDATE: The below images are the Belgian Blue cow. A commenter here keenly says:
AlishaMay: "Watching the video, you learn that the cows were produced via selective breeding to isolate genes that result in an over production of muscle mass. That could certainly be morally objectionable, but not the same caliber of hormone injections like the article falsely accuses. If the reporters in the article cited as a source for this post were fired for reporting misleading information such as this, than THAT should be the shocking story."
http://en.m.wikipedia.org/wiki/Belgian_Blue
That being said. There are definitely cows that are given bovine growth horomones to increase yield and which has been proven to cause cancer from milk.
http://www.naturalnews.com/039561_super_cows_beef_production_mutants.html
Below images are Belgian Blue breed.
Sources:
https://www.minds.com/blog/view/43822/two-reporters-fired-by-fox-news-for-revealing-health-dangers-in-milk