public bool Run()
    {
        Point p = PictureBoxDog.Location;

        while(p.X < 530)
        {
            int movement = Randomizer.Next(0, 3);
            p.X += movement;
            PictureBoxDog.Location = p;
        }

        if (Location == 4) //Incomplete section.
            return true;
        else
            return false;
    }

private void button1_Click(object sender, EventArgs e)
    {
        Dog dog1 = new Dog(pictureDog1);
        Dog dog2 = new Dog(pictureDog2);
        Dog dog3 = new Dog(pictureDog3);
        Dog dog4 = new Dog(pictureDog4);

        dog1.Run();
        dog2.Run();
        dog3.Run();
        dog4.Run();
    }

public bool Run() //Dog1.Run()
    {
        Point p = PictureBoxDog.Location;

        int movement = Randomizer.Next(0, 30);
        //Location += movement;

        p.X += movement;
        PictureBoxDog.Location = p;

        if (Location == 4) //Incomplete code.
        return true;
        else
        return false;
    }