diff --git a/Chapter 7/Exercise 7.3 b/Chapter 7/Exercise 7.3
new file mode 100644
index 0000000..9923d99
--- /dev/null
+++ b/Chapter 7/Exercise 7.3	
@@ -0,0 +1,17 @@
+class Animal {
+    constructor(species, sounds) {
+        this.species = species;
+        this.sounds = sounds;
+    }
+    speak() {
+        console.log(this.species + " " + this.sounds);
+    }
+}
+Animal.prototype.eat = function () {
+    return this.species + " is eating";
+}
+let cat = new Animal("cat", "meow");
+let dog = new Animal("dog", "bark");
+cat.speak();
+console.log(dog.eat());
+console.log(dog);