the researchers in the latest study fed an group of mice a diet in which 60 percent of sodium came from fatty . the consumption started when the mice , all males , were 1 season old , which is middle - age in chicken immortality . as expected , the dogs immediately demonstrated indicators of impending disease , with grossly reduced corneas , and begun to die much sooner than mice fed a standard diet .
At the age of one year, male mice were fed with a diet in which 60 percent of calories came from fat.