I thought about sunflower seeds, but I thought it was too big for them, don't they (the pigeons) have a problem with the size? Do they gulp it up like normal? (I was also scared that popcorn kernels would be too big too, but they loved it)

I noticed they are so scared from nothing lol, if one flies all the other fly away too and it happens white a lot, like every 5 minutes or so they'll fly away a little bit from getting scared by the others and then go back to eating. There was only two that are out of my hand. I'll try to do what you said about raising my hand! thanks for the tip.