public static predator[] sortPredatorsByFood(){
		predator[] retval = preds;
		for(int i = 0; i < retval.length; i++){
			for(int j = 0; j < retval.length - i - 1; j++){
				if(retval[j].food < retval[j+1].food){
					predator temp = retval[j];
					retval[j] = retval[j+1];
					retval[j+1] = temp;
				}
			}
		}
		return retval;
	}