Abuse or neglect of a horse?

Hi, I have a few questions about horses.I am a huge animal lover and feel that all things living deserve compion and understanding. anyway, I drive by a male black horse that has a barn and a fair amount of room to wander, maybe a quarter acre, but i NEVER EVER have seen anyone with him. Doesn't matter what time of the day or night for at least three years. This poor horse looks so depressed that it breaks my heart . He looks so lonley. I have seen him eat many times so i think that he gets food. What he eats i don't know. I have parked my car and walked quite a ways to get to him in the bitter cold and snow bringing carrots to try to get him to come to me to no avail. I have spoken with animal control about this and according to Colorado law and there is nothing that anyone can do. He is considered LIVESTOCK. What does that mean? When it's *** cold out there and i mean the kind of cold that cracks your face when you walk out the front door. Why do people not think that any animal doesn't feel the same way. And think about it, if no one gave you any attention day in day out what would most all of us feel like? These animals are at our mercy. All of GODS creatures. Just because they are animals do they not feel lonley, neglected, sad, bored? Help me please to understand. I don't get it. If people want a yard ornament then go out and buy a plastic pink Flamingo . All of us , animals for sure included, deserve respect and care. While we are warm in our home in the winter or cool in our air conditioned homes in the summer, we need to think of our dogs and cats and horses and everything else that we have control over and put ourselves in their situation. What would you do???????