Should I treat torn bark on trees or let it heal naturally?

It would not be recommended to put any type of dressing on the rips. Some of those wound dressings can encourage decay. Let the wounds dry up and start producing callus growth, 2-3 months. Then, it is suggested to make an appointment with your local office to have an arborist explain how to bark trace the injury to correct, as much as possible, the damage. Feeding the tree will help increase callus tissue generation. Irrigation during drought can also improve plant health if you are in a position to water the trees.