Animation Constantly Playing?

I have set up the animator and all of the code, but the animation keeps looping? Help, I really can’t figure it out.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class cHOPdOWNtHIStREE : MonoBehaviour {
	public int Treelives;
	public Animator _anim;


	// Use this for initialization
	void Start () {
		Treelives = 10;
		_anim = GetComponent<Animator>();
		
	}
	
	// Update is called once per frame
	void Update () {
		if (Input.GetMouseButtonDown (0)) {
			_anim.Play ("Chop", -1, 0f);
		}
		
	}

	void OnTriggerEnter(Collider other){
			if (other.CompareTag ("Tree")) {
			if (Input.GetMouseButtonDown (0)) {
				Treelives -= 2;
				if(Treelives == 0){
					Destroy(other.gameObject);
				}
			}
		}
	}
	void OnTriggerExit(Collider other){
		if (other.CompareTag ("Tree")) {
			Treelives = 10;
		}
	}
}

in the inspector, in the import settings of the model/animation. uncheck the box that says “Loop”.