Hi, we have an oak tree in our yard that suffered an injury last winter when the top of a white pine broke off and fell on it. I've attached a picture. Above where the trunk naturally forks (hard to see the fork in this angle), the smaller half of the fork is badly splintered. Is this something we should have a tree service trim up (cut cleanly)? And if so, what time of year is best to do it? thank you for your assistance