Jackson is about 17lbs give or take, active and healthy size. He gets 1/2 cup of kibble per day on most days. We do 1/4 in the AM and 1/4 cup in the PM. Breakfast he usually has Wysong Dentatreat sprinkled over the kibble, some mornings a bit of Grizzly Salmon Oil. Dinner we usually mix a bit of Weruva wet food (I buy the small cans because the big ones go to waste, I don't use enough, I just do a little spoonful in kibble and stir it around). He also gets a small 'Get Naked' chew every night (about 18 kcals per stick) and an occasional bully stick (maybe one a week). Oh and training treats whenever we train, or whatever and they are either Zuke's (2 cals per treat) or Cloud Star Soft n Chewy Buddy Biscuits ripped into tiny pieces.
We've found this is the best for us, and keeps him in the best shape. If he ate what the bag recommended, he would be very plump. LoL. If he's a lot of exercise (like excess swimming all day, etc), I will give him more (like 2/3 cup per day). At one point, I was feeding him more and found he got a bit 'chubbier' for my liking.
This is how I like him:
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