diff --git a/src/panel/pets.ts b/src/panel/pets.ts
index 1a4b1112..a72eeeec 100644
--- a/src/panel/pets.ts
+++ b/src/panel/pets.ts
@@ -221,7 +221,7 @@ abstract class BasePetType implements IPetType {
         this.currentState = resolveState(this.currentStateEnum, this);
 
         this._name = name;
-        this._speed = speed; // TODO #183 : Add a random modifier (+/- 30%) to this value.
+        this._speed = this.randomizeSpeed(speed);
 
         // Increment the static count of the Pet class that the constructor belongs to
         (this.constructor as any).count += 1;
@@ -285,6 +285,13 @@ abstract class BasePetType implements IPetType {
         return this._speed;
     }
 
+    randomizeSpeed(speed: number): number {
+        const min = speed * 0.7;
+        const max = speed * 1.3;
+        const newSpeed = Math.random() * (max - min) + min;
+        return newSpeed;
+    }
+
     isMoving(): boolean {
         return this._speed !== PetSpeed.still;
     }