Have they(or this one) been moved to a different paddock? When they arrived the enclosure fence was new Deer netting, here the background is the old-style Whipsnade fencing - is this the old Musk Oxen(or the Wisent) paddock? Probably to prevent parasite build-up or overuse of first enclosure.
This one was separate from the mother and calf in the paddock nextdoor to the European bison paddock [I believe it did formerly house musk oxen]. I don't know but could it be seperate for the sake of the youngster?
A male Moose is a bull, not a stag [sorry to be picky]. I understand they are very susceptible to parasites, so rotating the grazing would make good sense. Good photo, lovely animal.
When are we going to see these free-ranging in the UK?