Both of my dogs have major anxiety over nail trimming, but my young female is starting to show aggression over it. I can buy a muzzle for her, but I'm reticent to start this because she had a bad upbringing as a street dog who got picked up by the dog catcher when she was only 2 months old. I would much prefer some tips on how I can get her to wear down her own nails. I've heard people say that running your dog on concrete will take care of nails, but I've never had any luck with this. Does anyone have tips for how to get around the nail trimming or dremel tool sanding for dogs? I just don't want any more fear-biting going on. She's had enough trauma in her young life and I don't want her thinking that there are times when she can get away with biting and showing her teeth to people.