Shadow brought back the kittens after
that first road trip.
[ETA: Nearly that entire link is about Smoky's loss, beware! :( "Smoky's grandmother brought us new feral kittens the following week, 18-April. They're gone now -- probably she decided to abandon them/lead them off to new territory."]
Mother and kittens went away 2-4 more times since then for the day... then returned.
Twice this week they've all gone missing. Granted, it's idiot season -- where half the neighborhood blows up firecrackers day and night, a horrible experience for cats and dogs alike. Let alone lawn mowers.
Friday all the kittens came back late. I fed them wet food, knowing they'd be starving and thirsty.
Last night we got Nixie, hoarsely mewing, and Jack, at 11pm -- same time as Friday. But not their sister Cali.
Sunday I'd seen Nix at 9am, who then fled, but not his sibs. Back towards the far corner of yard. Shadow must've taught her feral kittens to climb fences... or to try to. Whenever the kittens vanish, I tell Shadow "bring back the kittens" and she realized that means I'll feed them wet food when they're home.
Last night, oddly, Shadow didn't want any wet food. The boys and her adult daughter Vee happily ate it.