What can I do to stop my dog from gnawing at its paws?

If your dog is gnawing its paws it is most likely because it is itchy there. If the paws become red and irritated so that sores develop you should contact a veterinarian. Your dog may have a bacterial or fungal infection, or be suffering from an allergy or reaction to something in its environment. Sometimes it can take a while, and several tests, before the cause is found.