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[–] TrivialGravitas 0 points 1 point (+1|-0) ago 

Redshifting is the result of that expansion. It happens because stuff is moving away from us faster the farther way it is. If for some reason redshifting is due to energy loss, than there's no expanding universe.

That said, stellar wind is a thing, so no redshifting is necessary but I found a review of galactic wind from 2005, and while they specifically refute the possibility I'd assume experts in galactic wind would have brought it up if it were even a remote possibility:

http://arxiv.org/pdf/astro-ph/0504435.pdf