Is this Bumblefoot? How can I cure it?

[sscaria]

I recently saw my sister's chicken, Beb, limping around. I picked her up and checked her foot to see some sort of 'scab'. It might be bumblefoot, but since I'm a new chicken owner, this is my first case of whatever this is. Based on basic images, I can't decide whether it is or not, and what to do. Is this bumblefoot? If so, is it severe/what should I do? If not, what is it/is there anything I should do? Thanks in advance.

 

[Aapomp831]

It is bumblefoot... the black scab is from infection. It needs to be soaked in warm epsom salt water as the first step... I’m attaching a useful article.

https://the-chicken-chick.com/bumblefoot-causes-treatment-warning/