OVIS- cow moose which aren't bred during the rut in the last week of Sept through the 1st week of October, will come into estrus every 28 days for several months after the rut. The behaviour shows perhaps one or more of the cows missed being bred, and was coming into estrus.
: It is interesting the moose hadn't lost his antlers, but then, they usually drop them in mid to late January around here as well.