The "haw" is the third eyelid. As far as boxer standard, pigmented or "dark haws" are desirable; unpigmented or "light haws" are less desirable. "Double dark haws" means that the third eyelid is pigmented in both eyes. "Double light haws" means both are light. "Show side" refers to the left side, which is the side that faces the photographer when posing for show photos.
Creek has "double dark haws," which is most common in plain (non-flashy) boxers.
http://farm3.static.flickr.com/2319/...9b7398d6_b.jpg
Caney has "double light haws" which is most common in white boxers, and also commonly seen in flashy boxers.
http://farm3.static.flickr.com/2130/...58a9055a_b.jpg
MaeBell has double light haws, although you can only see one of them here. This would be the "show side"
http://farm3.static.flickr.com/2162/...d0ff21a8_b.jpg
Another explanation of "haws" here:
http://www.worldwideboxer.com/PAGE6.html
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Zoë
Creek - Fawn Female, born 03/27/2001
Caney - White Female, born 03/26/2007
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