By Brandy McDonnellAn abbreviated version of this review appears in Friday's Weekend Life section of The Oklahoman. 2 1/2 of 4 stars.Movie review: Documentary 'The Cat Rescuers' tails four big-hearted New YorkersThe mean streets of New York City are especially tough for the feral felines and abandoned house cats living in the America’s biggest city.The scrappy crowd-funded documentary “The Cat Rescuers” follows four big-hearted, Brooklyn-based volunteers working to aid the throngs of toms and tabbies without homes.Although the source of their statistics is fuzzy, filmmakers Rob Fruchtman and Steven Lawrence assert that at least 500,000 deserted and feral cats live in NYC.