Cottage birch trees

A couple of years ago we had a massive caterpillar infestation up north. Caterpillars were everywhere eating off leaves from all the trees. That year we lost all the leaves on the trees. While the other trees recovered, the birch trees started slowly dying. Last year we hired a man to cut down four trees. This year that same gentleman will be cutting down 8 more. I took a picture of the trees. They are so prominent around the house and garage but if we don't do something they could do some major damage if their tops break off. The birch trees will be missed but thankfully there are some really nice pine trees near the birch that will now be able to take off and grow much bigger.