Poor guy! Fortunately, I’ve never had an issue with bumblefoot (knocks on wood), so unfortunately I may not be of much help
. But it sounds like there are some good suggestions here and from the image it doesn’t look like he has the tell-tale scab another commenter pointed out. Could he have been stung/bitten by something? If so, maybe the swelling will go down as you tend to it and as it heals, he’ll be able to put more pressure on that foot. Hopefully, you’ll get someone commenting who has had this same problem before. Good luck!
