How to start at a specific coroutine?

I'm not entirely sure I'm understanding the coroutine business completely. I'm trying to write a simulator where an animal starts at a house, and leaves the house in search of food. If he touches food, he then must return back home. Unfortunately, I cannot manage to get this animal to return back home. This is the code I have so far

 var speed = 1.0;
 var home : Transform;
 
 function Start() {
     home = transform;
     routine(transform);
 }
 
 function routine(transform) {
     while (true) {
     var curPos = transform.position;
     var sTime = Time.time;
     var jLength = Vector3.Distance(curPos, home.position);
     yield move(transform, curPos, home.position, sTime, jLength);
 
     var meat = GameObject.Find("Meat");
     var pointB = meat.transform.position;
     sTime = Time.time;
     jLength = Vector3.Distance(home.position, pointB);
     
     print (home.position);
 
     yield move(transform, home.position, pointB, sTime, jLength);
 
     sTime = Time.time;
     jLength = Vector3.Distance(pointB, home.position);
     yield move(transform, pointB, home.position, sTime, jLength);
     }
 }
 
 function OnTriggerEnter(col : Collider) {
     if (col.gameObject.name == "Meat") {
     print ("Touched meat!");
     StopAllCoroutines();
     routine(transform);
     }    
 }
 
 function move(thisTrans, startPos, endPos, startTime, journeyLength) {
     while (thisTrans.position != endPos) {
     var distCovered = (Time.time - startTime) * speed;
     var fracJourney = distCovered / journeyLength;
     thisTrans.position = Vector3.Lerp(startPos, endPos, fracJourney);
     yield;
     }
 }

I'm probably not doing this correctly at all.