well i need to get some epsom saltThose toes look rather fat for a Silkie. You should also trim his nails. If roos are fed protein or calcium rich feed ie layer pellets , it makes them susceptible to gout.
https://sites.google.com/a/poultrypedia.com/poultrypedia/poultry-podiatry
Every one needs Epsom salts in their first aid kit. Great for flushing toxins internally and soaking externally . I always have a box on hand for suspected poisoning. A good antibiotic spray is also a must. I keep a can of Terramycin and have used on horses, goats, chickens and cows.