I have two coral burst crabapple trees at the corners of my Patton that have done great for about 5 years. Last year one of them started losing leaves. I didn't prune anything because I thought it may be temporary. This spring however the branches didn't leaf out so I pruned them back. What remains seems to be healthy but now I have a crooked tree. The tree at the base also has a split in it. (See photos). The second tree was fine last year but had some of the same symptoms as the first tree and now has dead branches and some of the healthy leaves are turning yellow. The bark near the base is also having problems. What should I do? I have more photos but I can only attach three of them. Thank you for your help.