It is instinct for dogs to dig their nests, and it is also a very common manifestation. When a dog feels that its nest is uneven, uncomfortable to lie on, or has other smells, it will use its paws to dig the nest until it is satisfied. Pregnant female dog Before giving birth, if you want to give your baby a safe environment, you will also have the behavior of digging into the nest. Cracking and digging holes are actions that every dog ​​can do, it is their nature.