Milk isnt automatically made, its stimulated by hormones, every time the babies try to nurse, it makes the mom release more hormone. If you hand feed with out reason you'll end up having to hand feed.
I agree 100% with this. I think many people end up stuck in a hand feeding schedule by worrying.
Here is an example of what you will see;
Just Dry weight: 45, 52, 56
Next morning weight if mom has started to produce milk: 42, 50, 54
Next morning weight no milk: 41, 49, 51, quiet kits (not so much squeaking)
Second day weight milk: 42, 51, 56
Second day no milk: 39, 47, 49 (kits are very quiet and very hungry) I will start hand feeding when I see this and split the smallest kit onto a surrogate mom.
Third day milk should be in. 43, 53, 59. I don't interfere so long as they are all gaining.
I had my first true no-milker for a second litter recently and she had a litter of triplets. On day two I started rotating her kits with kits from other moms to keep her stimulated and let everyone feed because she had not produced for her first litter. By day six the kits weren't even bothering to suck on her so I culled her and fostered everyone out. They do a much better job of raising kits than I do, so I try not to hand feed.
Hope this helps!