
Are you sure your not giving her to much so she can be fussy as she is never really hungry.
Try for a couple of days to give her half what you have been giving at each meal, and pick the bowl up after 15 minutes whether she has eaten or not. At the next meal (she should just be going onto 3, but you might like to stay on four) do not offer her any more food than that meal (in other words don't add the uneaten food to it).
After two days she should be eating four reduced size meals eagerly and you can very slowly increase them if she appears to need more food (feel her body condition and weigh her before you start and once she is clearing her bowl).
The packets of food usually over estimated the amount the dog needs by at least a third, and in my dogs case they eat little more than half what is recommended on most food bags to keep correct weight.