A breeder just gave me 2 cochin eggs she found while I was buying some chicks. She said she didn't think they were good but wasn't sure. Don't know how old they are. I candled them. Very dark, very full, large air pocket. One seems to have reddish fluid & smells a little (the egg or hen?). No movement in either. How long should I wait? Don't want them to explode & damage other good eggs. Thanx!