diff --git a/Herd.java b/Herd.java
index bf6a527..6647d5a 100755
--- a/Herd.java
+++ b/Herd.java
@@ -25,6 +25,7 @@
 	private ArrayList<Cow> herd;
 	private Cow[] parents;
 	private Cow[] offspring;
+	private int selection;
 
 	private Herd()
 	{
@@ -62,6 +63,16 @@
 		if (c != null) herd.remove(c);
 	}
 
+	public void select(int id)
+	{
+		selection = id;
+	}
+
+	public int selected()
+	{
+		return selection;
+	}
+
 	public void setParent(int id)
 	{
 		Cow p = getCow(id);
@@ -122,12 +133,13 @@
 
 	//TODO Test the serialization code!
 	
-	public void saveHerd(String filename)
+	public static void saveHerd(String filename)
 	{
+		if (singleton == null) return;
 		try {
 			FileOutputStream fileOut = new FileOutputStream(filename);
 			ObjectOutputStream out = new ObjectOutputStream(fileOut);
-			out.writeObject(this);
+			out.writeObject(singleton);
 			out.close();
 			fileOut.close();
 		} catch (IOException i) {
@@ -137,7 +149,7 @@
 
 	public static void loadHerd(String filename)
 	{
-		Herd singleton = null;
+		singleton = null;
 		try {
 			FileInputStream fileIn = new FileInputStream(filename);
 			ObjectInputStream in = new ObjectInputStream(fileIn);
@@ -151,7 +163,7 @@
 		}
 	}
 
-	public void resetHerd()
+	public static void resetHerd()
 	{
 		singleton = null;
 	}