When Jose Navarro landed a job as a federal poultry inspector in 2006, he moved his wife and newborn son to a rural town in Upstate New York near the processing plant, believing it was a steppingstone to a better life. Five years later, Navarro was dead. The 37-year-old’s lungs had bled out. Under new proposed rules, which could be finalized as soon as this summer, the number of chemical treatments used on the birds is also likely to increase further, according to agency documents and USDA inspectors.