Hmmm... I guess it just depends on the doggy.
Each one is different.
For a pup, I wouldn't say 3-4 is abnormal, but if it's more than she used to... maybe you are over-feeding a bit? Which particular Now! formula are you feeding? Some are higher calorie and less needs to be fed.
Or maybe a certain ingredient is not agreeing with her, etc. But I'd say as long as they are normal poops (not soft, or runny, etc) then I wouldn't worry too much - food transitions can sometimes take a while.