The bad thing is I don't have a vet in my area that would work on chickens i thought by antiboditcs and soaking his feet would make the swelling go down but it didn't work some people say to do surgery but I wouldn't even know where to start my best guess is he must have got a splinter in his foot from the roost and it got infected or he got it hung on the chicken wire one day and cut it I have been using peroxide too to make sure the infection doesn't get worse the foot that doesn't have the black scab is a little better because the scab was in a different place and it fell off with perxiode but it is still swollen tho
Well, if you can't get him to a vet, if it was me, I would try the Pen G injections. Although, I will say Kathy, another poster, is saying her vet book says birds get higher doses than cattle/sheep. So, the dose I told you may be too small. Based on what she is showing us it would be more like 66,000 IU/kg.(2.2lbs) One ml contains 300, 000 IU so you would need to weigh your rooster. So a rough estimate, an eight pound rooster would need almost one ml a day. Thats a rough estimate I don't have a calculator. I would give it to him for five days and then make sure you get some probiotics in him, plain non flavored yogurt with the live cultures in it, mix a tablespoon in a little of his food daily for several days after treatment.