Feeding schedule – advice appreciated

I feed my 17 week old goldendoodle puppy twice daily. In the morning, he gets 1 cup of kibble (nutrisource) with tbsp of duck wet food then same in the evening. The bag says 2 cups is ok for his weight. He also has occasional bone marrow, his bully sticks, etc throughout the day + dried liver treats. Is this enough food? Sometimes he doesn’t finish his second meal.