Here's a tip for trapping them.
I ordered a cat trap. I've rarely used it for stray cats tho.
I feed and will s/n the cats that come on property.
I feed them outside and when the chickens come, they will run feral cats off. Aggressively. They'll charge them, peck at them. I'm always amazed. They crap in front on my doorstep, on my driveway and on my truck!
Forget dry corn or veggies as an enticement in a trap for chickens and roosters. Use dry cat food.
I had one rooster stalk the trap for hours with dry food. Crowing all the while, mind you. So new tactic.....
For the ones that are leary of a trap, even with the dry...they can't resist the wet cat food.
If a hen gets trapped and all chicks don't, if you're patient you can entice same way to put in box and then reunite with hen in trap.
Or you can snag them, one after one, after much chasing around, using a spaghetti strainer and a dust pan. The chicks are fast and can hide, run and dart all over.
I've had experience and obviously not a fan.