Today while sitting in my Minnesota office analyzing Brutus' locations emailed to me by the satellites, we found that his pack apparently has moved the pups some 4.25 km (2.6 mi) to the NW of the den. After July 18, none of Brutus' locations were at the den, but 5 were at the new location. Such a move of the pups is common during mid-summer, both in the arctic and elsewhere. Wolves usually move the pups to new locations, sometimes closer to prey or food supplies but other times for reasons unknown.
The new locations may or may not be near dens or other refuges and are referred to as rendezvous sites. The pups are usually kept at these rendezvous sites until they reach adult size and can travel with the rest of the pack. That takes place about October in southern areas, but in the arctic, that time is unknown. We eagerly await Brutus' signals to reveal that information.