We have a pigeon's nest on the balcony. I constantly gave seeds while the dove was hatching eggs. And when the chicks hatched, too, did not forget. I often went to the balcony to see if everything was fine. "Parents" were around all the time. But one day I went out to feed and noticed that there were no "parents".
And this day was windy cool weather. And I, like a caring mother, put a rag in the nest, because the nest was very wet. I was afraid that the chicks would die from the cold, because from the "parents" and the trace of the cold. But for this I had to pick up the chicks to make a rag, though I put on gloves so as not to leave my smell on them.
But I went astray, I didn’t have to touch them. But it's' too late. "Parents" did not even return at night. Now I do not know what to do? They left their kids forever because of the fact that I intervened in their lives. Tell me what to do? Can they come back if I remove all the rags? (Gulya)
I advise you not to worry about the fact that you are guilty in this situation. The fact is that there are many examples when people helped the birds, but they did not abandon their children. And exactly the same number of examples when people had to fulfill the role of "parents". It happens that pigeons leave babies for various reasons. The most banal reason - they could die or this is their second / third brood.
As for your case, I do not think that the kids were left without breadwinners to a greater extent through your fault. The fact that you put rags, yes, could scare away the birds, they could throw a nest on this. The fact is that sisaris are generally very critical to the modification of the nest. But in this case, you would see them even at least once after your intervention.
If you remove the litter now, the birds will not return anyway. If blue doves have already abandoned their children, then the more they do not return to them. In your case, it remains only to help the chicks survive a difficult period. And then they will fly away from you.