Bantam cochin start laying at about 20 weeks?

[Henfla]

I have one bantam cochin and the rest are mix with wyandotte. All of them are 19 weeks now. A few days ago, the bantam cochin started squatting when I was going to pick her up. I have felt her pelvic bones, and they have separated. Her vent is also much larger now. I haven't seen her messing around in the nests yet.
It's a bit suprising to me that is seems like she is getting ready to start laying, because I have read that bantam cochin start laying at 8-9 months.
What is your experiences with bantam cochin and when they start laying?

 

[sourland]

Generally they are late bloomers, but with animals (including humans) there are exceptions to the 'rule'.

 

[Henfla]

Generally they are late bloomers, but with animals (including humans) there are exceptions to the 'rule'.

Thanks alot!