Dogs have proven time and time again how valuable they are to our lives and now 9 Calgary dogs are being trained to detect cancer. Since last summer, researchers have been working with the University of Calgary to see if dogs can sniff out chemical compounds in the breath of patients who have lung cancer. So far, two dogs have proven they can. Eventually, researchers hope to be able to train the dogs to sniff out other types of cancer as well. Other dogs appear to be able to detect early stage disease for lung, gastric, breast and even ovarian cancer tumors. Of course, early detection is incredibly important and these dogs may be giving doctors an important tool to be able to treat patients as early as possible.