I think it's scientifically interesting that you have recorded weight loss around moulting time, Rick, as i expect most keepers, myself included, don't actually weigh their hens on a regular basis, and just rely on feeling the keel of any birds who appear not to be thriving. Knowing their weights when healthy must be a great help when diagnosing changes. Undoubtedly, an almost complete change of plumage does take it out of them. They become unable to lay because of the nutritional demands of growing new plumage, and also there must be considerable hormonal change to cope with, - a sort of annual menopause for older birds who, in the wild, would probably become prey once their first two breeding summers were over.
However, not many are as lucky as yours - mine do get cucumber occasionally, but so far have never asked for cups of tea. Do yours get it in bed in the morning?
love and good luck to Bonnie xx