You should keep at least one of the boys to keep your pullet company until you have some more chicks for her to hang with. Usually you can integrate older and younger chicks once the littler ones are old enough to be partly feathered and able to keep away from the older ones. You can provide heat zones for the different age chicks so that no one is too hot or too cold.
It's a little hard to see them through the clear walled container they are in.
It's a little hard to see them through the clear walled container they are in.