I got around the mothers leaving chicks on the ground by moving them to a broody coop once hatched if they hatched wild. It takes a couple or three days of being there to put the chicks in with mum if they cant manage a ramp and they are sorted after that.I believe they would. It is almost always the artificially incubated birds that fair poorly when thrown out to free range for the first time. Just today I turned out a pure Cracker hen who only hatched 3 chicks (3/4 Cracker, 1/4 Blueface). I let her brood her chicks for a couple of weeks in a small coop. Now they have free range of the farmyard. I suspect they’ll return to the same coop every night. All three chicks represent the same cross, they are all hers fathered by Lanky. This fall I started keeping eggs separate from each hen for the first time. Every batch so set is only of one hen and one rooster and are toe punched accordingly. I’m looking to see if certain hen/rooster combinations make better survivors than others.
The worst issue I have with mother hens is them flying up high to roost too early. I have lost entire broods from hens leaving them all on the ground as they fly up into trees or a high nest box. The best way I’ve found to combat this is to lock them in small coops for the first couple of weeks and then leave the coop open for them to come and go from. They seem to return to that safe coop each night and to stay on the ground longer with the chicks. I also include low roosts that chicks can usually access by week 2-3.
I’ve had the odd chick that will make it up steep inclines on day one and up to an 7-8 foot roosting bar just as soon as they can flap and fly. Ideally I’d love to only let those amazingly early developers be the survivors and breeders. But that wouldn only net me a couple of new birds a year for the next couple of years.
In case anyone tries it, wear eye protection even if you're used to handling stroppy hens. The mums come out of the coop in full battle order when the chicks give a distress call and mum doesn't care how big you are and of course, you'll have one hand taken holding the chick.