Ok... all you math nuts help me on this one

It would appear she is using an average. Not all kibbles contain 5oz per cup. It depends on the size of the kibble, density, etc. You can't accurately figure all foods at a set number of oz. If you are having some questions about how SHE calculates it, it may be a better idea to ask her. I believe she is happy to answer emails (but then I don't know as I have never contacted her).  
If the bag you are using says 5oz per dry measure cup then it should be easy to figure how many cups in the bag. Without running all the numbers, your figures appear to be right and I am sure your are very much on top of how much your dogs are eating and how long a bag will last for you.

I'll bet if you ask Lillian, she will be more than happy to tell you exactly why she wrote that!

We should all take a cup of our kibble and weigh it. I'll actually try that tomorrow, Sharon. I have some Natural Balance Sweet Potato and Fish in the closet. I'll take it to my friend's house and weight it, and her Pedigree, on her scale, and let you know what a cup of each weighs.

BTW, she's switching over to raw. I told her last week that she might try a chicken peice instead of a marrow bone, to cut back on the wear on her dogs' teeth, and they LOVE it. She was scared to give it, so she asked for some raw feeding links. She's decided that her dogs don't need grain, or vegetables, and that they're going to slowly switch to JUST RMBs and some organ meat. YAY!

and that they're going to slowly switch to JUST RMBs and some organ meat.

Yikes! That doesnt sound like a very well balanced diet. Do you mean she is only going to feed bones and organ meat,thats it?

Meaty bones. Like chicken leg quarters. They aren't little dogs, they're GSDs. They can eat just about anything she throws at them, LOL. They'll also get juiced veggies and some yogurt and eggs and such, from her food. She is always sharing stuff with them, and they happily eat away. RMBs and organ meat is fine, as long as there's enough muscle meat on the bones. They get beef ribs and chicken parts, so far. She'll start them on pork and possibly some fish (though maybe not, she's a big fish lover, she has huge aquariums and a koi pond) soon. They also get fish oil. 

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Again, maybe you should just email Lilian instead of trying to decipher how she calculated it. It seems to me that you are being somewhat critical of her methods to make a personal point of some kind.
 
Jeannie, I think your idea of kibble weights would be a great idea. It will clearly show you how different each can be. Take into concideration also, that the size and shape of kibble is going to account for some difference in how much can "fit" into a dry measure cup. Each brand is going to be different, even if it's only a couple of oz (which add up when you think about it). A food weighing less per "cup" would be less dense than foods weighing more per "cup" depending on the size and shape of the kibble typically, but that's not a hard and fast rule.
The practice of measuring your dogs food in a "cup" is really rather deceiving and IMO, I feel we should be feeding based on weight of the dog and "weight" of the kibble. So, for example, if your dog weighs 15lbs, then it should get 4oz daily. To heck with the *cup* method.

The practice of measuring your dogs food in a "cup" is really rather deceiving and IMO, I feel we should be feeding based on weight of the dog and "weight" of the kibble. So, for example, if your dog weighs 15lbs, then it should get 4oz daily. To heck with the *cup* method.

 
I kind of always figured that is what the bag has you do. Eagle Holistic Chicken says 4 to 5 cups for 100 pounds. Standard 8 oz is approx. 3.6 oz of Holistic Chicken.  I always heard that you follow the bag instructions because each brand or formual was different.  

Mordanna has responded to my emails quite readily. I hadn't worked out ounces to cup. Instead, I worked out, by estimating, that my dog eats close to a pound a day, especially on a day when I give him steak, roast beef, or pork. And it works out to that. A 40 lb bag, which is the size I buy, lasts about 40 days, maybe a little longer. Without a sale going on and using my discount card, a 40 lb bag just cost me $36, 90 cents a pound. Other times, with a sale, I may spend $32 for that same bag, dropping my price per pound to somewhere around 85 cents a pound. But it wouldn't matter if it cost more. I'm not going to quibble over $4 every month and a half. I'll buy him what he can eat that he likes as long as he does well on it.
 

Hey, dyan, I'm slow but I eventually get there. I just noticed in your avatar that he is sitting at the computer. Was he surfing the net, taking away from your computer time?
 

Ron, I think I mentioned before that Bubblegum was the smartest dog I have ever owned!!!  She does NOT miss a trick!  This was taken the same day:

 
 
 

It must have been extremely difficult to decide between the two pics which one to use for avatar.
 

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