diff --git a/src/backend/Sheep.java b/src/backend/Sheep.java
index b05d141..6bd6985 100644
--- a/src/backend/Sheep.java
+++ b/src/backend/Sheep.java
@@ -32,11 +32,12 @@ public class Sheep extends Agent {
 	public boolean liveTurn(ArrayList<Agent> neighbors, Simulator world) {
 		if(world.getCell(x, y)==1) {
 			world.setCell(x, y, 0);
+			hunger-=2;
 		} else {
 			hunger++;
 		}
 		this.moveRandom();
-		return hunger>10;
+		return hunger<10;
 	}
 
 	private void moveRandom() {
diff --git a/src/backend/Simulator.java b/src/backend/Simulator.java
index fb2e95e..f39a0aa 100644
--- a/src/backend/Simulator.java
+++ b/src/backend/Simulator.java
@@ -196,18 +196,25 @@ public class Simulator extends Thread {
 		// only modify if sure of what you do
 		// to modify agent behavior, see liveTurn method
 		// in agent classes
+		ArrayList<Integer> arrayDeadAgent=new ArrayList<Integer>();
+		int counter=0;
 		for(Agent agent : agents) {
-			ArrayList<Agent> neighbors = 
-					this.getNeighboringAnimals(
-					agent.getX(), 
-					agent.getY(), 
-					ANIMAL_AREA_RADIUS);
-			if(!agent.liveTurn(
-					neighbors,
-					this)) {
-				agents.remove(agent);
+			
+			ArrayList<Agent> neighbors = this.getNeighboringAnimals(agent.getX(), agent.getY(), ANIMAL_AREA_RADIUS);
+			if(!agent.liveTurn(neighbors,this)) {
+				//agents.remove(agent);
+				arrayDeadAgent.add(counter);
 			}
+			counter++;
 		}
+		int counterTwo=0;
+		for(Integer i : arrayDeadAgent) {
+			if (i==arrayDeadAgent.get(0)) {
+				agents.remove(i.intValue());
+			}else{agents.remove(i.intValue()-counterTwo);}
+			counterTwo++;
+		}
+		
 		//then evolution of the field
 		// TODO : apply game rule to all cells of the field
 		
@@ -288,14 +295,13 @@ public class Simulator extends Thread {
 			}else {setCell(x, y, 0);}
 			break;
 		case 2 :
-			if(getCell(x, y)==0) {
-				setCell(x, y, 1);
-			}else {setCell(x, y, 0);}
+			Sheep Shaun=new Sheep(x,y);
+			agents.add(Shaun);
+			System.out.println(agents);
 			break;
 		case 3 :
-			if(getCell(x, y)==0) {
-				setCell(x, y, 1);
-			}else {setCell(x, y, 0);}
+			Wolf agrou=new Wolf(x,y);
+			agents.add(agrou);
 			break;
 		default:
 			break;