When chicks are large and bloated it is usually from having incubated them at too high humidity. Once they are to day 19-21, pip and are hatching, the humidity shouldn't cause bloating.
If there is condensation on the glass the humidity is at least 70%. That's plenty high....Just leave them be to hatch now. Good luck....keep us posted!!
If there is condensation on the glass the humidity is at least 70%. That's plenty high....Just leave them be to hatch now. Good luck....keep us posted!!