If you have had a new roof installed, purchasing CQs to protect your new vents is a really good idea. If there are squirrels present and you have lead flashing, they will get to it eventually. Why wreck a brand new roof by having to have the flashing replaced, that’s going to require shingles to be moved and they never look the same afterward. A CQ is an inexpensive way to stop this from happening for the life of the roof.