what kind of hen is she?

I'd call that one a Red Sex Link. One of many different varieties of red sex links.

 

Mahonri is probably right. I had a couple of Production Reds several years ago that looked a lot like your girl. Just a tad darker on the body.

 

yup id say some kinda production cross or a sex link. very pretty though.

 

she is a cutie!

 

she looks to be a buff oprington or buff rock cross.

 

Its not a full buff Orp. It has too much color on its tail but pidgey could be right for it to be crossed with something