Duck with corns

I don't know anything about ducks but I did find THIS that might help.   

I'm on the edge of Birmingham. Emailed another half dozen vets yesterday, still awaiting replies.

The other ducks are getting tell-tale marks on their feet now. Does one always need to remove the infected centre? I read I might need to but felt perhaps it's better for a vet to do it, though I could have a go. I'd have to hold the duck in Epsom salts for 20 minutes to soften the corn, desensitise the area then nick the scab with a modeller's knife, clearing then draining?

I've made a neoprene shoe which it has been wearing to protect it. She's been walking fine since I first treated it two days ago.

Often I let my ducks out of the run and I've noticed a badly limping wild duck nearby which I think might have infected my birds.

Thanks, I've finally found a vet that has some experience with ducks though I will try yours in future.

I carefully followed instructions gleaned online and the several books I have and performed some minor surgery with no pus forthcoming. I probably didn't lop off enough scab. The duck continues to walk around fine, though with a bandage on. I have noticed a lot more corns/bumbles appearing despite the treatment the ducks are getting.

I found a vet that charged £90 to remove the infected growth and supply me with hibiscrub for my other ducks and baytril for the one they operated on.

All their feet have much improved but there are still little round marks on a few. I had my ducks when they were 4 months old and they do not like being handled and cry blooming murder when they see me now. It has been quite an ordeal. They do seem to go silent when I clean their feet though but I'm unsure if this is because they secretly enjoy it or it's sullen resentment.

It's gone on for two weeks and they've been confined to the coop - with very occasional forays into the run. I've had to keep them on straw as that's easier on their feet but now I'm thinking of letting them out.

Despite their reluctance I shall be checking them over more frequently in future.

I've wondered about using stockholm tar on their feet but I'm unsure. If anyone has any further advice or information regarding bumblefoot and ducks I'd be happy to hear it. Thanks again to everyone that helped.