Females typically will eat more then males as they grow larger and need more nutrition. So even though your female may be the same length but thicker as the male, the female is not done growing so should continue with the size of her girth. I have not had a male grow larger then 3 ft and my females not smaller then 4 ft.

You can either feed her two at once or feed her one every 5 days to make up for the lack.