Maybe I'M Old school or just plain old but when my chickens have bumble I usually just go ahead and open that scab and get the bumble out.
With my duck it was different since there wasn't a scab and it didn't look like any bumble i had ever treated. So off to the vet we went. She put her on Metacam and antibiotic for 14 days after 7 days it didn't look any different so I used a scalpal with dh holding her and made a small slit and popped that core right out. Then I used antibiotic ointment and wrapped it till her foot was healed. I do think the antibiotic may have gotten the bumble to the place it was ready to come out. I honestly think this bumble would not have resolved on its own.
With my duck it was different since there wasn't a scab and it didn't look like any bumble i had ever treated. So off to the vet we went. She put her on Metacam and antibiotic for 14 days after 7 days it didn't look any different so I used a scalpal with dh holding her and made a small slit and popped that core right out. Then I used antibiotic ointment and wrapped it till her foot was healed. I do think the antibiotic may have gotten the bumble to the place it was ready to come out. I honestly think this bumble would not have resolved on its own.