My Chihuahua mix used to do that.. Not only chew her toenails, she would actually bite them so they were ragged, something like a human with a nail-biting habit... Strange behavior and I don't know why and she never really stopped... :-/
Laela: 3.5 year old Aussie/Husky mix (maybe Catahoula?)
Tyr von der Sauk: GSD born 9/18/10
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