I don't band mine so couldn't help. I wish mine would even lay.
I have six hens. Three are four years old and two of those are my only layers now and have been for some time now, Carly and Aimee. Penny is the same age, hasn't laid in ages, though I thought I got two of her eggs recently, I haven't seen her on the nest so could have been mistaken. Maybe they were Aimee's, just more pointy.
Lucy and Mina are three years old and I haven't seen an egg from either in over a year. Sissy is only a couple of years old now and she also hasn't laid in ages and ages. Her eggs are distinctive, very broad at the big end so I'm sure she isn't laying. What is up with these hens??? They get good nutrition, lots of light-heck their little 4x8 coop has two big windows, one in front and one that takes up the entire end almost. They aren't overmated. Aubrey rarely even breeds the hens. Spike isn't that enthusiastic, either, but he does his part. This is one reason I am not getting more of them. I have enough pets.