In the footage you see the female wolf preparing several dens. In total, there were at least 34 such dens in kinds of a burrow, cavity or only a pit in the denning area of the wolf breeders. You see one of the actual burrowdens. It is a former badger's outlier that was enlarged by breeding wolves. The litter was inside this burrow during 46 days. More details https://sidorovich.blog/2022/06/08/do...