Does anyone use aviary bird supplements for their chickens?

[chuckzoo]

My one hen is going through a molt and loosing a lot of feathers as we approach the coldest part of the year! She is not feeling great and eating very little.

I was wondering if I could give her some "Feather-Up Molting Supplement" which is used on avairy birds?

Does anyone have any experience/ comments - I would like peoples opinions please.