[DogFoodie]

Go! Senior has 394 kcals per cup. It has several protein sources, but none are red meat. Orijen Senior has 445 kcals per cup and has several protein sources also, but no red meat.

You could try Abady granular for your hard keeper. It has about 800 kcals per cup. It’s not reviewed here, but several regular posters (myself included) having used it with success.

I’ll keep thinking.