how much food to feed a puppy

hi just wondering how much food to feed a 7 week old male staffy pup I am currently feeding him advanced puppy plus about 100 grams a day over 4 meals the packet says about 40 grams a day. his stomach doesn't look bloated and when I do feed him he attacks the food like he hasn't been feed in weeks

Me personally would feed the pup 3 times a day if hes constantly hungry are u worming him regularly? . If hes wolfing the food down i would just feed a bit at a time cut the meal into 2 portions

WE just followed the feeding advice with the food. We also used treats as a reward so did not worry about underfeeding.

Is it this food?

http://www.advancepet.com.au/products/dog-products/puppy/puppy-plus-growth-all-breed,-chicken-3kg.aspx

There's nowhere there on the feeding guide that says 40g per day, even for toy breeds. For a Staff, you should be looking between the medium and large size dog. So 100-185g per day. You have some room to add a bit more if you think he is looking a little skinny or seems unusually hungry.

As Crystal said, make sure you keep up to date with worming as this could be a contributing factor to his hunger

And feeding 4 meals a day is good! After a few months you can cut down to 3, then about 6 months to 2 if it's more convenient.

thanks for all your replies iv just started giving him worming tablets and ill try feed a little bit more and see how that goes

they are just rough guides on the packets i ended up giving my girl about twice the amount it stated. Any he doesnt eat take it away.