From the bird forum:

A: A couple of pigeons nested on our balcony last summer. The bird grew up, and the couple remained guarding their place. Since then, I have dismantled the balcony from the excess dirt and every night I feed them so that the other pigeons don’t see. My couple comes for breakfast in the morning and jealously protects the territory from other pigeons. I would like to watch the puppies again next summer, but I fear that the place has already become a dining room for them, not a shelter. Last year I didn’t feed them while there was a nest to avoid attracting other birds. How to make the balcony attractive to raise puppies for the next year?

B: Fill the balcony again!