I once found pigeon nest behind my window with 3 eggs in it. I didn't have the heart to destroy the nest. Little did I know about what filth I will have to clean up once they take off. Also, they left behind some very tiny beetles that I battled with for few weeks to come. They were so tiny they managed to squeeze in through the window's sealing.

This year I found an egg again. I threw it away.

Surprisingly little excrement before hatching, compared to what comes after. And even that is less ugly than what happens when the magpie gets the chick before it gets too big. My current approach is allowing them to breed but sterilizing the eggs with a quick round of cooking. I feel sorry for them when they are close to giving up (how much conflict between hope and growing doubt fits into a pigeon head?), but just removing the eggs will lead to a another attempt and sometimes I'm away for long enough to allow them to get from zero to hatching

(that's how I learned about the magpie situation, was away long enough to have an entire laying-hatching sequence after leaving when freshly sterilized, I suspect they gave up early, magpie discovered and took the abandoned eggs, remembered the spot and came back to the chicks after the next breeding attempt - pure speculation but the schedule would just fit my absence)

Why would you want this? They'll crap everywhere. If you have neighbours they may not appreciate it either.

I always felt curiosity about pigeons, specially homing pigeons and pigeon racing. Where I live, there is not much interest in pigeon racing, but there are quite a few pigeons and doves. Considering I have no neighbours nearby and there is plenty of space here in the outside, I tried to attract them but I failed so far.

Do you do the same with city rats? Both are carriers of a huge amount of diseases.

Have you tried providing food? All you need is raw seeds, no salt!

There are all kinds of small and big birds that visit our balcony, especially in what passes for winter these days.

Yes, I left seeds, bread and other stuff pigeons and other small birds may eat, and also provided some kind of shelter, but the only visits we have here -no matter if I provide food or not- are seagulls, which I'm not interested in.

If you’re not already, try using nutritious food formulated specifically for pigeons or doves.

Seed-heavy diets, even if formulated for pigeons, are very fatty and may not make them feel great after eating. And bread is basically junk food for birds! So if you try a more nutritious blend of food made for them specifically, they may really enjoy it and come back for more.

Plus I imagine gulls won’t bother with their tiny food.

Maybe seagulls drive everything else away. Can't think of anything else, provided there are trees and bushes around.