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How to prevent older dogs from creating lick or scratch sores
Try an elizabethan cone.
This cone, also colloquially known as the " cone of shame, " is a cone that wraps around your dog's neck. It physically stops the dog from licking its body.
However, the cone may not work well as a long-term solution, so make sure you talk to your vet about what may be wrong with your senior dog. You may need to take the cone off so the dog can eat and drink.