code: private static InputStream getCowFromCowPath(final String cowName) {
  		String cowPath = System.getenv("COWPATH");
  		if (cowPath != null) {
  			String[] paths = cowPath.split(File.pathSeparator);
  			if (paths != null) {
  				for (String path : paths) {
  					File cowfile = getCowfile(path, cowName);
  					if (cowfile != null) {
  						return cowfileToCowInputStream(cowfile);
  					}
  				}
  			}
  		}
  		return getCowFromResources(cowName);
  	}
docs: This will attempt to load a cowfile, by name, from the COWPATH environment variable or bundled cowfiles.
  Note that bundled cowfiles are considered part of the COWPATH since this is how to original `cowsay` worked.
  COWPATH takes precedence and bundled cowfiles are only considered after searching the COWPATH.
  
  @param cowName The name of a cowfile, e.g. "sheep" or "sheep.cow".
  @return An InputStream to the first matching cowfile found.