My almost 7 month yorkie (in less then 2 weeks) is going through the same thing, at first i started mixing her dry food with wet that helped a bit but she still isisn't eating as much as usual. so this past Friday she had a vet appointment and i told the vet that for the past few weeks she hasn't been eating as much. i told him that she has no problem eating treats, drinks plenty of water and is always very playful and otherwise always her normal puppy self.
Well the vets response witch makes total sense if you think about it.......
When she was younger she eat more because she was growing so quickly now that her growing is slowing down and is kind of gonna be done growing soon her eating has slowed down also and therefore does not need to eat as much as she did when she was still a puppy (under 6 months).
The vet said that my girl is perfectly healthy has a good weight on her and does not looked under feed, he told me that she was fine and not to worry as long as she is eating she's ok. Rylie as well only eats about 1/2 a cup a day.
Not sure if this helps but it defently eased my mind, specially since it came from the vet.
