Is it normal to lose their tail?

[yodelinginca]

Had one hen last year go through severe molt, she lost almost all her neck & big tail feathers. Eventually they regrew. I understand it's normal for pullets to go through a molt or two their first year. But now my hens are 15mos and my black sexlink has lost all but 1 of her big tail feathers. Is this normal for this age? She's not being picked on, and all behavior seems normal, she just has a stubby butt.

 

[AllenK RGV]

I'm sure all is well here is an article from the Learning center.
https://www.backyardchickens.com/articles/what-happens-when-chickens-molt.67366/

 

[Eggcessive]

Has this 15 month old hen ever molted yet? Almost all of mine lose their tail feathers when they start molting. Pictures may be helpful.