Hello :D
I posted in the CKCS thread the other day about my girl's eating habits, too. Coco is 9m old and fed twice a day and sometimes, meals definitely go untouched. I also was of the impression I'd have to be worried about over-feeding her, but no concern here! She has done this for a while, a few months? but is definitely not wasting away at 8.4kg. I tried giving her slightly less each meal, then also tried delaying her meals by 30 mins to see if that helped and it's made marginal difference.
I suppse there are exceptions to every rule? FTR she is very healthy, bright eyes, shiny coat, sees the vet regularly, playful, cuddly, etc.