Apply bounce to multiple movieclips

Question

Hello there,
I'm having a bit of a problem with a basic game I'm making where I want to have a number of animals which bounce around the stage.. I can't seem to get the code to apply to more than one of my movieclips using a loop.. if I try to apply vx and vy to the individual movieclips then nothing happens.. for now I have the ten movieclips on the stage but only one whichbounces around.. I have managed to get all of them to move but they each stay in their own area of the stage, but I'd like each to bounce around the stage and not interfere which the others movement..
Thanks in advance
        public function Bounce()
            crosshairs = new Target();
            addChild(crosshairs);
            init();
        private function init():void
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align=StageAlign.TOP_LEFT;
            for(var i = 0; i < 10; i++) {
                horse = new Horse();
                horse.x = Math.random() * stage.stageWidth;
                horse.y = Math.random() * stage.stageHeight;
                addChild(horse);
                animals.push(horse);
                horse.addEventListener(MouseEvent.CLICK, onHorseClick);
            vx = Math.random() * 40 - 20;
            vy = 10;
            addEventListener(Event.ENTER_FRAME, onEnterFrame);
        private function onEnterFrame(event:Event):void
                crosshairs.x = stage.mouseX;
                crosshairs.y = stage.mouseY;
                vy += gravity;
                horse.x += vx;
                horse.y += vy;
                var left:Number = 0;
                var right:Number = stage.stageWidth;
                var top:Number = 0;
                var bottom:Number = stage.stageHeight;
                if(horse.x + horse.width > right)
                    horse.x = right - horse.width;
                    vx *= bounce;
                else if(horse.x - horse.width < left)
                    horse.x = left + horse.width;
                    vx *= bounce;
                if(horse.y + horse.height > bottom)
                    horse.y = bottom - horse.height;
                    vy *= bounce;
                else if(horse.y - horse.height < top)
                    horse.y = top + horse.height;
                    vy *= bounce;
        private function onHorseClick(event:MouseEvent):void {
            var animal = event.currentTarget;
            removeChild(animal);

Answer 1

I've slightly changed the code and I think I can see a little better now what is happening with multiple item..
I created a function which I call onEnterFrame, which loops through an array of movieclips and adds the bounce..
The problem is that when ANY of the movieclips hit ANY of the boundaries, ALL of the movieclips react accordingly instead of just the movieclip which has collided with the side of the stage.
Here is my updated code, can anyone see an answer to this ?
private function onEnterFrame(event:Event):void {
     startBounce();
private function startBounce():void {
     for(var i:uint = 0; i < animals.length; i ++) {
          var animal = animals[i];
          animal.vy += gravity;
          animal.x += vx;
          animal.y += vy;
          if(animal.x + animal.width > right) {
               animal.x = right - animal.width;
               vx *= bounce;
          else if(animal.x - animal.width < left) {
               animal.x = left + animal.width;
               vx *= bounce;
          if(animal.y + animal.height > bottom) {
               animal.y = bottom - animal.height;
               vy *= bounce;
          else if(animal.y - animal.height < top) {
               animal.y = top + animal.height;
               vy *= bounce;