There's an old Scottish comedy act of which the signature line to an Englishman's ears is:
"There's a moose loose aboot the hoose!"
(There's a mouse loose about the house!)
which this is uncannily like.
And yes, the obvious solution is to have left up proper instructions for the moose to have read so it could work out proper hammock/moose interaction scenarios.
(My farmer aunt once had a ram escape and fall in the swimming pool: a one-deep layer of soggy turds soon covered the water, like a lumpy oil slick! And the slowly-sinking ram was no happier that the moose, though a little less dangerous, when we hauled him out.)
Rgds
Damon