I have 2 enormous maples in my backyard. Not sure if they're sugar or Norway. 2 years ago the leaves were huge, red and orange and healthy. Last year they were smaller, more sparse, only yellow and fell early. A trusted "tree guy" said it was weather related to a drought in our area and they'd be fine this year. So far there is no budding this year. Most of our neighborhood trees are in bud. Should I be worried?