Up to a month or so.One of mine laid 12 hard eggs (1 a day for 12 days) , Then a soft, then a hard..
yesterday, She laid 2 soft eggs and today she laid 1 hard and 2 soft.. (1 hard and 1 soft was for sure her). I am not sure if one of my other hens is laying (2 are showing signs)
How long does it take their system to straighten out?