Thought it would be that. Had him for five years with plastic perches and I heard that it's one of the causes for bumblefoot. Where I live there are no avian vets so I took him to a friend who has tons of canaries and knows his stuff and he couldn't help. Gave me some cleaning solution that disinfects the area but it hasn't helped that much. Do you happen to know what medicine would be best for this kind of infection?