I've been spreading out Frank's feedings a little more than before - more like every 4-5 days now instead of every 3-4.
I weighed him today after eating 3 days ago and two big poops. He was 630G, down from 650G. It could have been when I weighed last time, he had eaten recently, just drank, or needed to go. That was a big jump from 620G previous weight.
I am going to keep on eye on it. If he starts losing weight, I will up food, if he's stable, I will stay on this schedule. He seems happy and healthy as can be and looks the same.