Sometimes it could be allergies OR ...lots of dogs are obsessive/compulsive and it becomes a habit - MY cocker chews her nails ...
I asked my vet why she does that... and he said dogs can be very much like people - we have nail biters...people who tug on their hair etc....and some dogs have nervous habits....like biting their feet.
If you see her pulling hair out or the skin is red - then I would ask the vet for sure |