Myles thrived on 15 -18 ounces a day (usually closer to 15) for a very long time. He too had DGE which I think is what caused him to have such a minimal appetite. I think babies with DGE absorb more nutrients from their food because it sits in the stomach so long.
In any case, if her growth rate is normal than I wouldn’t be concerned, especially if she’s happy. Myles was on the thin side for a long time as well, but his rate of growth remained steady and that’s what the doc said mattered most.
Is she fussy for a very long time after eating?
Just to encourage you, Myles did outgrow his DGE and now he eats like a horse! The boy downs 1/2 cup of oatmeal, 7 ounces of milk, and a jar of baby food for breakfast! And then he polishes it off with a couple fists full of cheerios.