My Chinese Pistache is about 7 years old. I noticed lately it is losing some bark. I thought it was from my son climbing the tree, but yesterday I noticed two branches never leafed out this spring. It looks like they started to but then never made it any further. So, I'm thinking something is going on with the tree. I don't do a lot of fertilizing in my yard, but when I do I use organic fertilizer and dried molasses. What can I do to help my tree?

Can you upload a pic?