DiggerDog Nail File Stress Free Alternative to Dog Nail Clippers and Dog Nail Grinders (Blue)

Will these be restocked?

Curious how you get them to scratch their back paw nails? I am very curious to give this a try but wondering if people have had back paw nail success?

how often should my dog be playing with this for it to work? once a day? once a week? and how many minutes do they typically have to do it for

What do you do when the grit paper is all used up? Are there refills?