Find a Wolf Armor item in a Trial Chamber chest
Open a Trial Chamber vault that can drop Wolf Armor
Use a Wolf Armor item on an adult tamed wolf
Remove Wolf Armor from a tamed wolf by interacting with it using shears
Repair damaged Wolf Armor in a crafting grid with another Wolf Armor or with an anvil using armadillo scutes
Obtain armadillo scutes from armadillos by brushing them or letting them drop scutes over time