Have you noticed any illness in the pigeons at all? I'm not familiar with pigeons, but maybe a possibility to look into pathogens that the pigeons can possibly carry but be resistant to?
It's almost like shooting a target in the dark; I'm so sorry but it does sound like she isn't faring much...
Oh, I apologize lol, I think there was a misunderstanding...
I got really confused reading your explanation if immunity vs resistance, so I just posted a quoted statement that made it easier to understand... At least for me lol ;)
I stated the exact same thing you did lol, was not disagreeing...
@coach723, thought you'd find this helpful;
"A plant immune to disease means the plant will produce antibodies/substance to kill or neutralize the ill effect. It is is controlled by a complex signaling network.
A plant resistant to disease means the infection will not occur. Possibly the plant...