Your dog could live longer thanks to 3,000 golden retrievers

A group of 3,000 golden retrievers from across the U.S. are taking "good dog" to a whole new level. Their checkups could help scientists beat canine cancer.

These golden retrievers are enrolled in the Morris Animal Foundation's Golden Retriever Lifetime study, the U.S.'s largest veterinary study ever. It researches what increases the risk of dogs developing cancer and other health problems, and ultimately aims to help dogs live longer, healthier lives.

More than half of golden retrievers end up with cancer, the foundation reports, so that's why they're the specified subjects in this study.

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These good dogs need a little human help to make a difference, though. Dog owners keep track of what their pups eat, when they sleep, if they spend time on a lawn with pesticides, and more. They also have to take their dogs for annual checkups, collecting and shipping off hair and body fluid specimen to be studied.

No big health discoveries have come out of the study since it started in 2012, The Washington Post notes. But the research has uncovered that about a quarter of the retrievers frequently eat grass, 39 percent swim weekly — and 100 percent of them are adorable.