If that buck is a 4.5 year old I would take him out of the herd as he would have bad genetics. I have been seeing a buck here in PA that is either a 2.5 or 3.5 year old that still has 2 months to grow and he is already much bigger than that deer.

It is still a great buck, but if your sure he is 4.5 years old, he should be taken out of the herd. From what he looks like to me though, he looks like a 3.5 year old!