Homeowners might want to think twice before bringing a dog into the house. Some insurance companies will be less than thrilled to hear about the new pit bull, the Rottweiler puppy or even the energetic Dalmatian because dog bites are on the rise, and they cost insurance companies millions of dollars in claims each year. The Insurance Information Institute in Washington, D.C., reports dog bites accounted for more than one-third of all homeowners insurance liability claims paid in 2010, costing nearly $413 million.