I have 2 polish one cock and one hen also one cream legbar,one black rock and a pair of welsummers; one cock one hen. I bought them as 0 week olds in may of this year. I guess they are 22 - 24 weeks old now . the blackrock started to lay in Mid july and has had only a day or two off since, the othere hens look ready but have produced nothing. Th polish hen stands out as a loner and seems to be a slow developer physically too. Any thoughts???: