A new survey finds that manure pollution from the state's feedlots is killing hundreds of thousands of fish each year. The Isaak Walton League found that from 1995 to 1998, eight feedlot manure spills killed almost 900,000 fish. Surveys of state agency data from nine other midwestern states resulted in similar findings. Rachel Hopper is the fish kill network coordinator at the midwestern office of the Isaak Walton League. She says fishkills are a "canary in the mine" indicator of how feedlots affect water quality.