The fire began at about 8 p.m. at the Tall Cedars Mobile Home Park in the 400 block of 37th Street SE, according to fire officials at the scene.
Four people inside -- two men and two women -- were able to get out of the home, but one dog died and a cat is still missing. One on the male residents was treated for minor burns. No one else was injured.
Valley Regional firefighters were able to extinguish the fire, but not before it completely destroyed the home.
Investigators aren't yet sure what sparked the fire, but they believe it started in the living room.