In TV and movie episodes of "Lassie," there was a running theme. When this canine star sensed danger, she barked and warned her owners to beware -- something bad was lurking. Today, dogs help man in many ways -- such as tracking and finding things for search and rescue and police work. Dogs' noses are 100 times more sensitive than ours. Dogs are being put to new uses every day -- sniffing out mold is one of them. Where testing and detection often takes months, trained dogs can find hidden mold in a matter of minutes without tearing up ceilings, floors and walls. Think you might have a mold problem? Before you start tearing your house apart, check out "mold-dog".com or dial 1-(800)-MOLD-DOG. Man's best friend is now mold's worst enemy. For more tips, visit our Web site at onthehouse.com. And that's the On The House tip for today.