Questions regarding feeding....

Evening everyone....

This time i am here with a few questions so i'll get straight to the point....
Question number one...
We are eating dry food only atm twice a day.....Drunna is 4 months old almost and a little over 5.5kg....I'm giving her the Acana puppy & junior with chickens which she seems to like a lot....And here comes the problem....The last few days i am getting the feeling that she is not eating enough....I followed what the food package said (5kg puppy that will get around 20kg as an adult dog ) and was giving her almost 160gr of dry food cut in 2 meals....
Drunna seems hungry though...So i called my vet and she said i should feed her 1/20th of her weight which is 250-280gr....And then i discovered that the food package had a "hidden" sticker on it that said that a 5kg puppy at the age of 4-6 months old should get 300gr of dry food.....I am now confused more than ever....today i fed her twice 110gr pre meal....she still seems to want more food
Question number two....
This is simple enough as i said i am buing Acana puppy & junior....My question is untill when should i give her puppy food and what you guys think about Acana???
Is there maybe another dry food you could recomend??? I would like to say something chipper also but quality comes first....

Thx for your time in advance guys

Is the dog wormed when an over hungry dog id look at that firstly they should be wormed once a month until 6 months then every 3 months after 6 months of age

Yes she is....she is to take the pill at 15 of june again
and still i do not know i might be underfeeding her

Does she look very thin ? If not and she's gaining weight then I wouldn't worry too much. My Flo would eat all day if given the chance.

No no she looks great to be honest not thin hot fat either...
This is mostly the reason why i am trying to figure out the proper dosage of food...Since she is a puppy i know she must eat good but not get fat....That's why i am a bit worried

Staffy pups burn and use a lot of energy i give mia 6 cups a day cut down to 4 .

hmmmm...my dogfood sais that 1 cup should be enough for a day for drunna...here come more questions...what size should a cup be???
Sorry if i am asking something stupid...i am from greece and my understanding for english is a bit rusty

Mug sized amount hun anything i can help with don't be afraid to ask one of the staff or other people will help you

Hehe thx...i think i will try it then giving her that amount as it sais on the board

Maybe give her little more and if she leaves some subtract that from amount you had give her, they usually stop eating when full. These are just rough guides they give you and yes they are confusing.

Sorry i wouldn't know what is available in your lovely country but try this website might help you.
http://www.allaboutdogfood.co.uk/