My 2 girls have been laying an egg a day each for the last 2 weeks after being rescued and brought back to good health and I'm very happy about that! but this morning I went out to collect and only found one egg. Half an hour later I noticed one girl go back into the nest she didn't pop out again for maybe 20 minutes. I race over to see what took so long and found a broken egg Does this just happen from time to time? Did she just stand on it as she hopped out?