YR, My father was a diabetic too. The doctors were concerned because he had it in his left foot and it was really an ugly sight for a while before they did anything for him. It took us 5 days to convince the rehab staff that something was seriously wrong with his foot and when we demanded that he go to the hosptial/ER, they knew then something was wrong. The ER doctor took one look and hooked him up to an antibiotic right away. The type of infection can do a lot of harm.
From what I've read, that particular infection usually comes from being in the hospital, nursing home, rehabs, etc. If you have a nick of any sort, the infection can get in the blood stream and really go to town. I'm glad it was caught in time. He'll start to see some improvement in the next couple of days.
Are you going to to go see him over the holiday?
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.