Your hen will get off the nest for breaks, sometimes quite often if it's warm out. A half-hour or so to stretch the legs, poop, have a dust bath... Isn't going to harm the babies. Even longer is likely fine. But if she's not coming back to the nest or growl/purring, she may be losing her broodiness.
My SLW hasn't ever gone broody, but she's a big girl. I'd assume Silkie eggs should be okay, but I know some larger breeds can crush smaller eggs - like you could give a Silkie some quail eggs, but they prolly wouldn't last under a bramah etc...
Eggciting to hear they're developing well.
Our lockdown here was a bit bumpy at firstHeard it's starting to toast up over there. We're across the ditch in NZ and it's a lovely spring day today... Now as long as everyone plays nice, we can get outta lockdown soon.
