Agree, looks like a hard molt. Keep treating your fungal infection, since your bird will be more susceptible to skin conditions while all those pin feathers are coming in, and you should do a routine mite check, beacuase it should be part of your routine. But looks like a hard molt to me - and the bird knows its not in top shape, which is why its keeping its distance from potential predators and flock mates who might pick on it as the weakest link. Takes a lot of energy, bird will likely be not lethargic, but less active than the norm.
Increased protein can help speed/ease the process, but be aware that BOSS is also very high fat. Don't go to excess. Though considerably more expensive, mealworms are preferable to BOSS in this case - similar protein, better trace minerals, roughly half to 3/5th the fat content. Or simply feed a 20% protein ration - or add some high protein complete ration (like a game bird grower) to your existing feed ration, and mix to the disered final protein figure (this is what I do). You have options, and plenty of support here on BYC to help you thru this.
The bird? Mostly its on its own, but you can ease the stress of it some.
