I need to decrease a value of the property only from specific class objects

Question

I have three classes and two of them inheriting from an Animal class, Carnivore class should have method to decrease health by 50 if I call the method on Herbivore objects only. How to write a correct condition in my case so i won't touch unneeded objects?

class Animal {
  static alive = [];

  constructor(name, health) {
    this.name = name;
    this.health = health || 100;
  }
}

class Herbivore extends Animal {
  constructor(name, health) {
    super(name, health);
    this.hidden = false;
    Animal.alive += [this];
  }



  hide() {
    if (this.hidden === false) {
      this.hidden = true;
    } else {
      this.hidden = false;
    }

    return this;
  }
}

class Carnivore extends Animal {
  constructor(name, health) {
    super(name, health);
    Animal.alive += [this];
  }

  bite() {
    // if ???
      this.health = this.health - 50;
    }
  }