I loves me some KC's !
All mine started laying later than six months so perhaps she's warming up to it ?
Mine are also quite 'opinionated' and will stop laying on principal or just because they fancy it. Once they are in their stride though, they are like laying machines so it all levels out !
Also, mine are not interested in sitting on their eggs at all - just popping them out, so only if one goes super broody (which can last all of a day in KC land) will they 'hide' one egg.
What are you feeding them now ? They look in great condition !