Yes, I had a bunch of healthy 5-6 g babies this season in one clutch from a young mother with 21 eggs. That’s on the smaller side but not unusual with larger clutches. Most hatch more like 7-8 g. One clutch this season was more like 9-10 g. My smallest were around 3 g. Those were twins, and one who was in a truly tiny egg.
I can’t imagine this at all! 
