From a psychological perspective, just as rats have a talent for chewing things, puppies also have a talent for tearing things apart. We know that the ancestors of puppies lived in the wilderness, and the only source of food was hunting. Taking a bite when you see something can help them find more food.
If your puppy is eating tissues or chewing on her own feet, it's likely that she's just satisfying her curiosity. Just like human beings, puppies understand the world through their mouths. Biting, tearing, scratching and eating paper towels are all fun, and they can also help them get familiar with the environment at home.
When your puppy is changing teeth, the roots of the dog’s teeth will be itchy from time to time, and scratching at this time will not be enough. In order to relieve the itch, the puppy will bite objects to relieve the itch.
The location of this article: https://www.petmh.com/dog/raise/109806.html
</p>
</p>