Game and Millet is a new flavour Hannah so I don't know if you've tried this variety?
I use HP Game and Millet but I feed half kibble half barf....
Jarvis looks so much better on it than he did Barking Heads and Orijen - he actually has some gloss to his fluffy brown fur and is a steady weight and I've noticed a difference in his energy levels. He has a sensitive stomach and in the past when he's had other kibbles that haven't agreed with him so well he becomes noticeably quieter. At the moment I have a 6 year old puppy
He's no more hungry on it than any other kibble and his poo's are small and hard (but as I say he's half barf so this could be the difference).
Different kibbles suit different dogs