Man's best Friend

It long been suspected that animals can sense when there is something wrong with humans. Recent studies have found that dogs can actually smell if a human has cancer.
“Can dogs smell cancer” was on the Discovery channel last week. . The researchers trained dogs of various breeds over six months to discriminate between urine of bladder cancer patients and healthy patients. The average success rate was 41%, compared to 14% which would be expected from chance alone.
The idea was first put forward by two London dermatologists in 1989. One of their patients requested that a mole be cut out of her leg as her dog would not stop sniffing at it, even through her trousers. One day her dog tried to bite it off her leg when she was wearing shorts. It turned out to be malignant melanoma which is one of the most deadly forms of skin cancer.
There have been many similar anecdotes which prompted further studies into this theory. This documentary revealed that dogs could be better at diagnosing cancer than current technology. It claimed that dogs can detected breast cancer at the early stages which would be not detected by mammogram. It also ran test using samples of lung and bladder cancer.
It is believed that cancer produces a certain odour and that dog’s excellent sense of smell can pick that up.
So perhaps dogs could be even better friends than we ever imagined!