I've got what I think is a cedar tree in my backyard that is missing most of its bark on one side from the ground to about 4' up. (Thanks to my puppy who is a shredding machine.) The branches next to the bare area of the trunk are slowly turning brown and dying. Is there any way to revive the tree and minimize the damage? Should I prune off branches that appear to be mostly dead?
Also, on the topic of preventative action: Are there products that successfully keep animals (dogs in my case) away from trees and shrubs?