Answer: I don't that they are dead, but they sound quite stressed. You may be over-watering. Junipers require full sunshine and fast-draining soils. One deep soaking per week should keep them happy. If you're watering more often than that, you're over-watering. Wait until spring, then prune back the dead parts. If the roots are healthy your junipers will produce new foliage.
Best wishes with your landscape!
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