I've only Had to treat bumble in my chickens but if you can make her shoe out of a plastic bowl just cut the plastic about size of the foot then wrap in vet wrap then lay the foot on it and wrap it may stay better I know they are amazing how they can get things off either wrap or keep on clean...
You can treat everyday with soaks and iodine till the scab will pull up easily or you can skip a day in between depends on how fast you want to take care of it and how bad it is. Good yours is not bad you'll be able to get a handle on it pretty quick if you'll do this daily till the scab pulls...
I had 2 chickens with bumble and both times after soaking in Epsom salt water and peeling off the scabs there was nothing but a hole where the scab was. You might want to try just using the Epsom salt water half cup to half gallon of warm water soak both feet [easier] and keep them from...
I'd do the iodine every other day . Looks like a rooster may have got hold of her? They can be pretty rough. When my hen had bumble foot I treated her foot every other day. I wouldn't use the blue kote along with the iodine though.