half my eggs are not ferterlized!

[sinister357]

i candled my eggs from my two pairs of pigeon and it seems one out of each pair is unfertilized??? in one of the two week old egg, half is filled with a solid. on the one week old, there are no viens as apposed to the other fertilized egg. is this fairly common for pigeons - to have this kind of odds for unfertilized? what should i do about the unfertilized? will it rot and be a mess if i leave it?