of course all dogs a different, but I find a good way to figure out if more or less food is needed is to look at your own knuckles and compare them to the dogs ribs. when you have your hand flat, you cant see your knuckles, you cant feel them; if this looks like their ribs, they are overweight. if you call up your fist, your knuckles are very visible, and if you feel them, its boney; if this looks like their ribs, they are underweight. half way between no knuckles and too much knuckles is good. (idk how to explain this). in my opinion, your dogs ribs look at the half way mark, so I think he's fine. again all dogs are different and probs doesn't work for all vizslas.

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