https://3speak.tv/watch?v=phoenixwren/luhtudba
This is a nail file board for dogs. You put treats in the box, and they scratch at it to try and get at the treats. It may take a little practice/training, but I saw a couple of videos of dogs using them, so hopefully my future pupper does too. :) Since a lot of dogs don't like getting their nails clipped, I thought I would try this.

(Chinese subtitles via DeepL. Chinese specifically because I also uploaded to Xiaohongshu)