well after 6 month dogs don’t really grow anymore in height. 40 pounds is around the weight of a female pit bull. If ur dog was taking after her father’s gene’s she’d be bigger right now. Like my female took after her dad at 6 months she was already 55 pounds. And her coloring like her father’s coat will not determine that she’s like her father. That’s just color. Mine looked like the mother in coat and markings but that was it.