Bumblefoot can cause lethargy and general inactivity in birds. If left untreated, the infection can travel up the leg and cause serious problems, such as osteomyelitis. That's why it's important you take the time to treat the infection before it gets out of hand.
The choice of treatment oftentimes vary with the owner's personal preference, and the severity of the Bumble, but oftentimes treatment starts by soaking the core in warm water for a few days/week to loosen the scab up, and get it to the point where it can easily be excavated with the use of a scalpel, and a pair of tweezers. After the scab it out, the area can be filled with an antibacterial ointment, the whole foot wrapped with gauze, and then bandaged until the area is healed to avoid subsequent infection to the area. I think the core is minimal enough you could treat at home, but if you don't feel confident doing it yourself, consult a vet.
You will find the highest occurrence of bumblefoot in heavyweight flocks, being housed on poor/dirty grounds that allow the dermal surfaces of the birds to be injured, and allow bacteria to enter. While sometimes, bumblefoot is inevitable the way we house domestic ducks, thoroughly looking at your setup, to correct any problems is just as important as treatment.
You can find some info on bandaging, and Bumblefoot in the links below :
https://www.backyardchickens.com/threads/duck-feet-bandages.1424682/
https://www.backyardchickens.com/threads/wrapping-feet.1255043/
http://www.scoopfromthecoop.com/bum...atitis, is,infected bird's reluctance to walk.
