Very red and warm legs

[Wolfefarmyard]

If this is scaley leg mites like I suspect, just like @ButtonquailGirl14 said, your whole flock will have it too. So you must treat them as well and thoroughly clean the coop.

 

[A_Fowl_Guy]

Clean your coop out and treat it with a Permethrin based poultry spray or dust. You can find it at your local farm store.

 

[Kayla's Lunch]

Poor thing! I hope he is able to recover!

 

[Eggcessive]

It does look like he has scaly leg mites by the loose scales. Some of the red streaks are probably normal coloring of a healthy fertile male, but the firy red skin up high in the feathers looks like a type of inflammation I have seen in pictures here before. Some of those cases lasted after many types of leg mite treatments. But I would certainly get started on treating the obvious scaly mite infestation with something like ivermectin topical. I am not an expert on leg mites.

One of the rooster experts, @roosterhavoc recently said that he treats with Frontline on the skin along the spine. Maybe he will chime in with his recommended dosage. I also would treat the coop and burn or bag the old bedding. Straw sometimes harbors mites, and they can be found in crevises of the coop.

 

[roosterhavoc]

I would do exactly what @Wolfefarmyard said. #4 gasoline and A and D ointment. Kerosene and Vaseline works too. I would
also cut his spurs. I use frontline one spritz under each wing and above the vent. Any kind of oil can be rubbed on their legs every now and then to prevent scaly leg mites. I’ve seen the red skin up high like that on perfectly healthy roosters but his is really swollen and extends further down the leg.