We have 2 kousa dogwood trees that were planted about 4 years ago. They have both done well until recently. One in particular did not bloom as heavily this spring as the other and does not have as many (very few) "berries" as the other. The leaves appear to be drooping and have a dryish look as compared to the other tree. The trunks on both trees have bark that is flaking off. We have had a recycled rubber tree ring around the bases of both trees to prevent grass from growing around the bases. They shouldn't be lacking water as we have had a very wet spring and summer here in KY and use our sprinkler system when things do get too dry.