She led him over to the heating vent near the windows. He put his nose down near the vent. "Phew!" he said, as he jerked his head back. He called maintenance. A worker arrived a few minutes later. He opened the vent. He found two dead rats inside. Shelly's manager said, "Boy, Shelly, what a good nose you have! How about coming up to the tenth floor with me and sniffing around? Maybe we have dead rats up there too.