Salmonella?

I woke up this morning to find a sick looking Greenfinch inside the peanut cake guardian. Not wanting to frighten him, I first checked on him through my binoculars; he looked in a poor state: squatting down, listless, with deep, heavy breathing. I went outside, took the cage off the guardian and brought the Greenfinch inside. Within five minutes he died whilst still in my hands. I asked for advice on Elizabeth and Malcolm's birding forum and it was suggested that it was most likely a case of salmonella. All my feeders were scrubbed eleven days ago after I spotted a sick male Greenfinch and a sick Goldfinch in the garden. None of the feeders were dirty but it was better to be safe than sorry.

Tonight, I have brought all the feeders in, washed them all again and disposed of all the food that was in them. Instead of putting them all back out, I have refilled just three of them until I feel it safe to put the others out too. I think I'll leave it at least one month - longer if I see more sick birds. I have ordered some GardenKlens from CJ Wildbird Foods to kill off any bacteria or viruses which may be lurking under the feeders.