It depends on so many variables, including the ones you mentioned, plus the dog's size, calorie needs, etc.
That said, I feed my dogs three times a day. They eat a small morning meal of about 1/4 cup Freshpet and 1/4 cup Acana kibble at 7:30am. At lunch, 1:30pm, they eat 3/4 cup Acana and a little Sprinkle of Freshpet, and at dinner, 7:30pm, they also get 3/4 cup Acana and a sprinkle of Freshpet. So it probably comes out to 2 1/4 cups of food, plus training treats throughout the day.
Lacy Lane's Sail On Silver Girl CGCA, RATI, Pet Partners Therapy Dog (Maizie)
Rock'nRolla Frosty Blue (Frosty)
Hi - like has been said there are a lot of variables. My spoo, Asta eats about 1 cup of Nature's Recipes Pure Essentials kibble with a sprinkle of Ziwipeak in the morning. He eats about 3/4 cup of Only Naturals MaxMeat or a can of Merrick Wingalings in the evening.
I just switched from kibble (which was free fed) to home cooking for all of my dogs. Lily gets a little less than this and Javelin gets a hair more than this recipe, but based on a 45 pound dog here is my formula: 4 oz. cooked chicken (including hearts), 2 chicken livers, 1/3 c. whole wheat pasta, 1 1/2-2 c spinach pulverized with some water in nutribullet, small amount each of safflower and hemp oils along with sea kelp powder and calcium citrate powder. I may also throw in some cooked carrots, green beans or a hand full of berries. They eat this 2X daily.
Lily AKC: CGC CD HIT CDX, RN RA RE RAE...RAE8 Multiple Rally High Combined, NA NAJ; APDT: RL-1; CPE: CL1-R, CL1-H, CL1-F, CL1-S, CL1
Peeves AKC: CGC BN RN RA
Javelin AKC: CGC RN (landed on Long Island July 10, 2015!) http://www.poodleforum.com/35-52-wee...s-javelin.html
My dogs weight around 52 pounds. I feed Merrick's twice a day, a total of 2-2 1/4 cups. If I fed as much as the manufacturers recommend (of any of the brands I've used), I'd have two fat dogs. Maybe the recommendations are for unneutered, more active dogs, but it's way too much for Blue and Jazz.
When I raw fed a couple of years ago, I calculated about 2% of body weight/day--80% meat/eggs/fish, 10% bone, 5% liver, 5% other organs plus a couple tablespoons of raw veggies, some fish oil, and a kelp blend for iodine. The dogs thrived, their weight was stable, they looked great, but it was a LOT of work, at least the way I did it, so I went back to kibble.
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