Bedbug-sniffing dogs are doing a blockbuster business, thanks to the constant scourge of city renters and buyers:

Increasingly, real estate lawyers are urging buyers in contract to inspect apartments before they close, and in their advertising, many pest control companies exhort would-be tenants to "inspect before you rent." And dogs like Cruiser can inspect a room in minutes, whereas lesser mammals like human beings need hours to conduct a visual inspection.

Bedbug-sniffing dogs, adorable yet stunningly accurate -- entomology researchers at the University of Florida report that well-trained dogs can detect a single live bug or egg with 96 percent accuracy -- are the new and furry front line in an escalating and confounding domestic war.

While experts cite a host of reasons for the upsurge, they agree on one thing: the bugs, which were mostly eradicated in this country at midcentury by now-banned pesticides like DDT but remained a constant scourge overseas, are finding their way back to the United States through an increase in global travel.