It's really going to come down to your dogs metabolism, activity level and how many calories are in the cup more than anything.
Gretchen gets 4 cups a day, 2 in the morning and 2 at night. If we have a lazy day where we both sleep for most of the day then she'll get a little less or if we have an active day I'll either give her an extra snack of a large biscuit to add some calories or a little extra kibble. It evens it's self out pretty well on keeping her fit. An average day she runs 1-2 miles (At her pace, I don't run her on leash this young), plays with our other large dog Maggie for a while or has play dates with friends dogs/goes to the dog park, we go for walks (anywhere from 30min-1.5 hours), she plays on her flirt and/or spring pole, we do small bits of obedience training including things like long distance recalls (maybe 10-20min 3-4x/week) and during the warmer months she likes to play with the water hose or go swimming in the pond. :P So she's fairly active I would say.
With that said, she's almost 6.5 months old (Was 50lb at 6 months) and at 4 cups a day it comes out to 1464 calories per day. (366/cup) At 4 months she was eating 2-2.5 cups a day depending on her activity level. At 552 calories per cup it came out to 1104-1380 calories per day for the 2-2.5 cup feedings.
4Health Salmon & Potato has 327 calories per cup so at 5 cups a day you're feeding 1635 calories. If your dog is maintaining a healthy weight on this then that is how much to feed. If he's getting too chubby then cut back. If he's too skinny then you probably should look into a higher calorie food. Waist line is how you tell if the dog is eating enough, not by seeming hungry.
Last edited by ChancetheGSD; 10-13-2012 at 12:11 PM.