What to know
Moose has 1,000 health and spawns in the Deep North.
It takes extra damage from fire; it resists blunt, slash and frost; spirit does nothing to it at all. Pierce lands at full damage, so that is what to bring.
Its hardest hit is horns at 160 slash, out of 3 attacks.
Of everything craftable, 
Thunderblood Crossbow, 
Lightning Strike and 
Frostfire Crossbow put the most damage through what it resists.
It always drops 
Moose Meat, 
Moose Hide and 
Moose Sinew.
It can be tamed with 
Lingonberries.
Taming food
Spawn command
With devcommands enabled, this spawns Moose in front of you. The third number is the level: 3 spawns a 2-star.
Creature ID: Moose · all console commands and IDs