When my birds were having free flight, I was often surprised how much they liked the clovers in the grass or grass seeds of lawn grass. If your pigeons can’t enjoy the free flight, then you still should give them something extra such as all sorts of extras such as green, raw carrots, peeled fresh peas, stale bread, boiled potatoes. Your birds will thank you and enjoy.
Playing for creative 'cook' is the message here. The additional administration of these products implies that there is some variation in their otherwise monotonous diet habits.