Most women in Chew look fairly average (e.g. Tony's sister Toni, Tony's girlfriend Amelia, Tony's daughter Olive, random passersby, etc.):

The women in the USDA, however, do not look average:

Has there been an explanation for why USDA agents are exclusively female (with the exception of John Colby, Tony's ex-partner who happens to be a cyborg), and all of the same "build1"?