You propobly know by now Chris that tnn do not make good broody or mother ,so you should be fine.I had found out that this breed was made utility breed,so motherhood is not an option.Hope you will have some surogate mother for future chicks.They cope very well with heat and crosses with broilers in hot climate tend to produce much faster and healthier eating birds.They do not like cold,maybe this is why you had this fungal infection on him?