Mine are the same age and I am having the same concerns. It’s like they are going through a phase or something. Maybe it’s chicken puberty. Mine aren’t laying yet but all three breeds that I have are usually at POL around 22 to 24 weeks so I know it’s close. They are eating the tether ball cabbage and will eat fresh grass clippings I put in their run and that holds their interest more lately than their feed. I don’t know what the deal is. I thought it was the heat for awhile but it has broken here and they are up moving around more and getting more exercise now in their run which is large for nine birds. It’s a 12 x 35 so they have lots of room and it’s about 12 high so they can fly some when they take the notion. I am out of guesses. They are healthy otherwise and their weight is good and have no signs of illness and are happy. IDK.