I have created a custom field called gender where some of the feeds have it and some dont.
However on some feeds I can tell the gender as the entire store is a menswear shop for example.
On admin/feeds_register_step2.php is it possible to have a box to add "Enter a Gender or" select from the dropdown box. This is similar to the one already for brand and category.
Where the feed has a gender I will use the drop down otherwise I will override.