From what I understand, humans grew larger brains as a result of a higher protein diet. Eating meat mostly. With today's high protein crops, I think that wildlife are or will slowly get larger brains as well. I have heard numerous people say that deer never used to look up, but it happens all the time now. There is guy that lives not to far away from me that puts a bright colored teddy bear at the base of the tree. He said that it keeps the eyes of the deer on the teddy bear and not looking up. Anyway, I think that deer and other animals are constantly evolving. I don't know if they are getting taller or faster. It probably all goes back to the quality of the food they eat and their ability to adapt to achanging enviroment. If they didn't evolve, they would go extinct. They sure have adapted well to living in cities. On a side note, a friend of mine tackleda doe in his back yard when he was drunk a few years ago. The deer we have in my area are big but if you drive a couple hours to the Black Hills of South Dakota then they are smaller. I have heard a couple different theories on the smaller deer in the Black Hills. Some people think that it is the food and others think that it is because smaller deer survive better in the woods. I think it is the food they eat myself. Not much good stuff to eat in the Black Hills.