But yeah, my troop eats a good bit. A 87 lb RR, a 45 lb APBT, a 25 lb lab mix puppy, and a 17 lb dachshund. And my RR and APBT and puppy all eat the same amount of food (4 cups a day) even though their weights are so different.
That doesn't add up correctly for me. Even when I had 6 dogs, we never went over 70lbs a month. And I had a 160lb Mastiff(hard keeper), 120lb Bullmastiff(hard keeper), 70lb GSD mix, 70lb Sibe, and two growing catahoula/lab/terrier mutts. And we fed at least 2 different formulas at any given time...never went over 70lbs of food a month. Well over 100lbs for 4 dogs and only one of them is a harder keeper is blowing my mind.
I think you might be overfeeding some of your dogs, or feeding a very poor quality food that isn't suited for their individual needs. Over feeding would be a good reason why your pup is constantly messing his kennel, too. Some dogs get fat when you overfeed, but some dogs get sick.
Getting a formula that actually MATCHES their nutritional needs will save you a lot more money than just getting a cheaper formula.
For example...
Zander ate 6 cups on TOTW, 4 cups on Fromm Surf n' Turf, 3 cups on Wellness CORE, and he is currently only eating 2 cups of Acana. Total per day. What he eats and how much of it has a huge impact on how he maintains weight, health, and energy.
What else have your dogs eaten, and how much of it did they have to eat per day in order to maintain weight? Which dogs got sick on what?
I don't mind doing the research for you to find something that suits your pack and your budget. I have nothing else to do today. Or tomorrow, for that matter! Lol.