When ever Iv been abit stuck for meat I try to feed abit of dry, but soon as I do I notice a change in attitude, more worked up, too much energy. Some would say that'll benefit in field, but don't be fooled because o find he has less stamina and pants a lot more off simply a bit of dried. So if the dog was fed just dried then I dread to think.
Iv fed "grain free" it's called, and another high meat n veg content food, gain 28 etc and all of them have been more or less the same as far as heating up quicker and being hyper.
Stick to my meat n bones, abit of veg from time to time, natural yogu