Why the hell is a dog on the field!?

I watched this Saturday and though to myself at the time, "What value does having a K-9 unit at the end zone bring to security of the game?" I mean, come on!? Are they gonna let them loose on someone on live TV in order to subdue them? And why two of them. The reason is obvious: They were farting around watching the game and probably getting paid $30/hr - $40/hr overtime by the University to do it. To top it off, the look on the cop's face after the dude pulled his hand out of his dog's mouth was one of disgust for the player rather than concern he wasn't controlling his animal! I think he figured it out when he departed the premises soon after. /asshat