Answer: If the browning area is producing new growth, then the stems are alive but the the needles died - probably due to chemical burn or dog urine. There's no guarantee that new needles will be produced in that area but as the spruce grows the area will be covered up. Dogs are usually creatures of habit and will continue to mark the same areas. If it is dog damage you may want to surround the spruce with wire fencing to provide some protection. Best wishes with your spruces!
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