Residents have been displaced by a fire at their Ball Pond Road home.  Danbury Fire Department, with mutual aid from Ball Pond Fire Company of New Fairfield, responded to the scene late Saturday night.  An addition tanker, emergency medical services, and police, along with Eversource also responded.  The fire was deemed under control in under half an hour.  Fire officials say there was some difficulty getting to some pockets of fire forcing crews to conduct an extensive overhaul of the residence. Red cross was requested to the scene for two adults and 4 dogs.  The Danbury Fire Marshal’s Office is in the process of investigating the cause.  There were no injuries reported. Units cleared the scene a little before midnight.