Andrew rarely will a small buck rub a large tree, but I have seen both small and large bucks rub the same small trees. One particular morning this season I watched a dandy 3.5 year old 140inch 8ptr (gonna give him one more year!) rub a small tree. 30 minutes later I watched a 1.5 year old forkhorn rub the exact same tree. I have seen such scenarios played out year after year. But in my 2 decades of chasin deer, I have yet to see small bucks rub trees much over 2" in diameter.

Good luck,
RA