Calling a static variable (not working)

Hey, I'm having a little problem but I believe I have some of it figured out, I just need the expertise of you guys :) Ok, here's the problem. I am trying to make a new scene load when a variable in a different script hits a specific value. When the variable hits 0 I want the end game screen to load. The problem is this:

I set the if statement to load the level if the variable = 3 (it is 3 on start up) the end game screen loads fine. But if I change the value to lets say... 0, when the variable hits 0 (when I have destroyed all of my chickens) nothing happens. It is like it's not updating, can anyone point me in the right direction? Thank you :)

The Code:

Collison script which I am trying to reference (name: CollisionChicken.js)

 var collisionchicken : GameObject;
 static var chickenHit : int = 3;
 var explosion : Transform;
 var Bwuk : AudioClip;
 var myStyle : GUIStyle;
 
 function OnTriggerEnter(c:Collider)
     {
         if(c.gameObject.tag =="bulletShot") 
     
     {
         audio.PlayOneShot(Bwuk);
             chickenHit--;
                 Destroy (collisionchicken);
                 Destroy (collider);
          var exp = Instantiate(explosion, gameObject.transform.position, Quaternion.identity);
         }
     }
 
 function OnGUI()
     {
         GUI.Label(Rect(251, 40, 100, 20), ""+ chickenHit.ToString("f0"), myStyle);
     }  
 

The countdown script (when the variable = 0 I want the end game level to load. Name :Countdown.js)

 var myTimer : float;
 var myStyle : GUIStyle;
 
 function Awake(){
     DontDestroyOnLoad(gameObject);
 }
 
 function Start()
 {
 myTimer = 0;
 
 }
 
 function Update () {
  if(myTimer > -1){
   myTimer += Time.deltaTime;
  }
 }
 if (CollisionChicken.chickenHit==3){
     Application.LoadLevel(2);
 }
 
 function OnGUI(){
  GUI.Label( Rect(250, 10, 100, 20), ""+ myTimer.ToString("f0"), myStyle );
 
 }

If you need any more information just ask, I will be here for a while :)