when i was a lad my father kept a lot of hens and we used to keep eggs for weeks until we got a broody hen, never in the fridge, just in the house, (no central heating in them days ) i even remember the eggs were rationed and u got one each per week, from the local co-op and did not knoiw where they came from, but took the chance and tried sum under a broody hen and they hatched, of course in them days all hens were free range and had cockerals among them, but yes i have kept pigeon eggs for a couple of weeks and they have hatched, so long as u take them away as soon as laid.