How to use the animator in children (C#)

Hello! My Game is a 2d Game.

I have a GameObject Player with the script characterManager that controls movement and Animations. The problem is that, I use different skins for the Player, 3 actually. Every Skin is a different sprite with different Animators but all the Animators Triggers are called in the same way.

 using UnityEngine;
 using System.Collections;
 
 public class CharacterManager : MonoBehaviour {
     
 
     
     Vector3 velocity = Vector3.zero;
     public Vector3 gravity;
     public Vector3 flapVelocity;
     public float maxSpeed = 5f;
     public bool shieldPowerUp = false;
 
 
     static CharacterManager myInstance;
 
 //    int score = 0;
 //string scoreText = "Score: 0";
 
     
     
     bool didFlap = false;
     float deathCooldown;
     
     Animator animator;
 
 
 
     
     public bool dead = false;
     public bool gameOver = false;
     public bool godMode = false;
     
     public static CharacterManager Instance
     {
         get
         {
             if (myInstance == null)
                 myInstance = FindObjectOfType(typeof(CharacterManager)) as CharacterManager;
             
             return myInstance;
         }
     }
     // Use this for initialization
     void Start () {
 
     
 
     }
     
     // Do Graphics & Input updates here
     void Update (){
         if (!animator) {
                         animator = transform.GetComponentInChildren<Animator> ();
                 }
 
         if (dead==false) {
                         
                     if (Input.GetKeyDown (KeyCode.Space) || Input.GetMouseButtonDown (0)) {
                         didFlap = true;
                         
                         }
                 }
         if(dead) {
             deathCooldown -= Time.deltaTime;
             
             if (deathCooldown <= 0) {
                 Time.timeScale = 0;
                 gameOver = true;
                 GameObject.Find("menu_button_pause").GetComponent<PauseControl>().paused = true;
             
             }
             
         }
         if (shieldPowerUp == true) {
 
                         godMode = true;
 
                 }
 
                 
         }    
         
     // Do physics engine updates here
     void FixedUpdate () {
         
         if (dead)
             return;
         
         
         velocity += gravity * Time.deltaTime;
 
 
         
         
         
         if (didFlap == true) {
 
                 animator.SetTrigger ("DoFlap");
 
         
             didFlap = false;
             if (velocity.y < 0)
                 velocity.y = 0;
             
             velocity += flapVelocity;
         }
         velocity = Vector3.ClampMagnitude (velocity, maxSpeed);
         
         transform.position += velocity * Time.deltaTime;
         
         
     }
     void OnCollisionEnter2D(Collision2D gameObject) {
         if(godMode)
             return;
 
         animator.SetTrigger("Death");
 
 
         dead = true;
         deathCooldown = 0.8f;
 
 
 
 
 }
 
     }

When I use the classic skin, everything is good. But when I change to another skin, the Animator animator doesn't initalize and the Other Skins Animations are'nt played and I think is because it just Initialized with the classic Skin and it can't do it again.

How do I make that my Animator Initialize with every Skin.

P.D. All the Skins are children of the Player GameObject P.D. When I Change Skin, the old skin's gameobject is disabled and the new one is enabled.

Thanks!