"Selection and medicines.
Why do pigeons from one fancier suffer much more from Adeno/Coli?
I can't prove anything, but when I look around me there can only be one explanation.
Some weaken their stock by using excessive and often incorrect medicines. And it seems obvious that weakened pigeons are more vulnerable."
I do agree with that. Like Andy I do not give my pigeons medications, sometimes for years on end. Also like him I am not so pig headed that I would not use medicine if it was required.
But a good loft, good hygiene, a good diet and good management appear to me to be the basis of good health. And healthy pigeons, like healthy people, don't need antibiotics on a regular cycle to stay well.
Just my opinion on it.
