Is this bubblefoot? Plus a few frank questions.

Yes, that's bumblefoot.
It is difficult to cure but doable. It depends on how many birds you have and how badly you want to save them. IMO, if the foot isn't badly swollen (like one of yours) and the bird isn't limping, it isn't suffering a lot.
There are many techniques to curing as you've found. One thing is that those birds do need to get off of the wire and onto some clean dry bedding. Corncob or pine shavings would be good.
You can begin by soaking in Epsom salts a couple times a day for perhaps 15 minutes.
If the wound is very hard, the past method was to cut out the puss pocket and inject the foot pad with a com-biotic. Doing that, you'll have to use an antibiotic ointment, wrap the wound with gauze and then vet wrap to keep it in place. Before you cut it open, clean it well with alcohol and iodine.
To the best of my knowledge, that method isn't prescribed any more. Once you do that, it takes a while to heal.
I recently discovered an herbal technique that is used by the University of KY with raptors. It uses CEH cream. After cleaning the foot with iodine, then apply a cream of Calendula, Echinacea and Hypericum. After you coat the affected area, again cover with gauze and vet wrap. Do this daily.
http://www.oocities.org/gymnogyps_gray/bumblefoot2.html

The only time I've had bumblefoot was this year and it affected several mature birds living in a building usually used for brooding chicks. They were roosting on thin boards covered with chicken wire and I'm sure that was the cause.
The cause isn't vitamin deficiency but a robust diet can always help a compromised bird.
The cause is any small wound in the foot pad that gets infected with staph bacteria which is in any poultry environment.

Hope this helps.

 

I ordered several of those CEH creams to keep on hand .... unfort there is a $15 minimum order and his charge is $7.50 shipping.. which I think is outrageous...but what can you do but make it yourself....?????
I dont have quail but who knows????
they are located in Wisconsin.. The Raptor place in Louisville uses it... after reading what "Canoechic" link
I dont know if he has a website.. I called over the phone....... had to sift thru and scan the bumblefoot article.....
can I list the business here??
heck I prob have all those growing in my property.....
thanks all

 

I found some Calendula cream, liquid extracts of both Echinacea and Hypericum locally at an herbal mfg. I then mixed it myself. No one here had the CEH and where I found it online was sold out.