@@bobinmissouri Your trees are old enough to be producing the max amount so I have to believe you need some other cultivars that would make better pollinators. Are they hybrid or American hazelnut trees?
I watched your videos and your trees look really nice and seem to be producing fine. From the looks of the husk and the size of the nut, I'm guessing you have American hazelnuts and you probably already knew that.If you have a small harvest with all those beautiful trees that you have,, the squirrels and blue Jay's must be getting them.