Do Pigeon Siblings Mate?

sorry did not read the long story but to answer the first question,yes siblings can become mates, I have two frillbacks that are and I use them for foster parents, or I just swap out their eggs with fake ones, that is the method of hatch control with pigeons.

Do pigeons inbreed?

Inbreeding. As stated previously, inbred pigeons tend to have poor vitality and are more prone to sickness. John Halstead mentions that he tries to keep a line-breeding theme in his breeding and goes on to state he rarely inbreeds pigeons too closely, though “half brother and half sister may be considered”.

Do birds mate with their brothers and sisters?

They are often monogamous, but within certain family groups, as many as 32 percent of individuals may mate with birds other than their mates; in particular, females may mate with family members in exchange for procuring more food for their young.