I think you should make the effort to either keep or find good homes for any hatchlings you breed.

Culling healthy hatchlings is unethical IMO, I heard of one US corn breeder that culled TWO THOUSAND (!!!????!!!) healthy corn hatchlings because they were low end morphs. I would give anything to have eleven healthy feeding corn hatchlings (that's the number I bred so far this year, the mother of one of the two clutches is currently triple clutching), I didn't place the lid back on a tub properly and three feeding babies took the opportunity to vacate their tub. Only one of the other three hatchlings from that clutch is a regular feeder and I've only got one regular feeder from my other female's batch of five worms