A. Licking and fretting is part of a normal dog's grooming behavior. It only becomes a problem when your pet does it in excess or carries it to the extreme.
In most of cases excessive nibbling is related to skin diseases. Problems like skin allergy, parasites, infections, anal glands problems usually results in excessive itchiness.
In rare cases skin irritation can be a result of internal disease like liver problems or even a tumor.
Excessive licking and chewing should be promptly treated as dog dogs will self-inflict skin scratches and wounds which could be easily avoided if treatment is not delayed.
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