Background on the hens: we got them at about 5 months old. 2 of them were laying and continued to for about a week or so, then 3 of them were and was consistent for a few days. then all of them stopped for almost a week. (breeds: 2 barred rocks, 2 red sex links) Now they are about 8-9 months old. only one of them is laying(barred rock) and that has been going on for almost a month. One other is laying blobs of egg white with no shell every few days or so but that is it. I have asked for advice on here several times, and have followed a lot of it. they have been wormed, given probiotic, I changed their feed to Nutrena Naturewise hearty hen 18% protein pellets all day every day, and oyster shell is available to them. my husband is ready to cull the ones not laying, and I cant defend them much longer. Advice??