This might be a tad off current topic, but I noted earlier that you said you were feeding them layer feed. That has too much calcium for the males and should not be fed long term. (Risk of kidney damage.)
They would all benefit greatly from a switch to flock raiser (less calcium, more protein) even your hen, who can have oyster shell supplement on the side when she gets well enough to lay eggs again. Hopefully her foot will heal without losing all of it. Perhaps the dead toes are frost bite as well or maybe the guy stepped on her toes? Perhaps he didn't know she also had a foot infection. In any case she is much better off with you. Best of luck with them.