Quote:
i got them at 22 weeks there is no sighn of the hens molting i am giveing them corn and they get the grit i put it in a bowl in the hen shed on the floor thanks
So, grit is not calcium, it only helps them grind up their food, and if you are only giving them straight corn, they may not be getting the proper diet. You didn't say anything about free-ranging them, so I am assuming you don't. Think about what a chicken would normally eat--a wide variety of grass, greens, bugs, grains, berries--whatever they scratch up or catch. And if they were getting a "layer feed" before they came to you, which is theoretically a balanced diet for laying-aged hens, you might have shocked their system a bit. Cracked corn isn't a complete food. That and they need a source of calcium. Either toast eggs shells, crush them and give back to them, or buy some oyster shell at the feed store. It is cheap. I go through a 5=lb bag with my 8 laying hens in about 6 months, and it is maybe $2.50.
And please see these threads for a discussion on complete diet & treats if you don't want to buy the standard Purina layer pellets (or whatever brand) from your local Feed Store.
https://www.backyardchickens.com/forum/viewtopic.php?id=478712
And the link for the treats chart:
https://www.backyardchickens.com/web/viewblog.php?id=2593-Treats_Chart
25 weeks old would be the start of when most breeds
may begin laying, but if they aren't getting any calcium, it will be hard for them to do their job.
Good luck!