Happy is light boned though right? I mean 25 pounds is right for her body type, she is not underweight right?
In that case I would feed for a 25 pound dog.

The shelties get Evo. Em is a porky 28 pounds right now (she should be 25) and she is getting 3/4 cup per day. Clipse is approx 28 pounds as well and he gets 1 cup per day.

In all honesty...I wouldn't worry too much about it...I mean how many days are they going to be on kibble for?