Crews responded to assist Union FD on a possible house fire off of Tarheel Trail. 6401 (MFFD) arrived on the scene and confirmed a working fire from a single story single wide mobile home. Union Engine 761 & MFFD Engine 643 arrived on the scene and begin fire attack. Engine 572 (GQFD) established a backup line on the "C" side of the structure. Rockwell Rural arrived on the scene and established a RIT Team on the "A" side of the structure. Crews were able to make a quick knock down on the fire and able to rescue 3 dogs from the structure. Once fire was brought under control crews were released while Rowan County FMO begin investigation.