The kids favorite tree in the backyard has some dead spots. What do I do? How do I achieve the maximum shade for the patio without ruining the view or harming my trees? These are the kinds of questions a trained arborist can help answer. Cal-Western Tree service retains a trained arborist to consult with you on your needs. Other members of our team are also currently training to be certified arborists as well. It's just one more way we are striving to give our customers the very best.