What you're doing sounds fine, but it depends on the age & breed of cat you've got. I free feed all my cats premium dry food & they regulate themselves - none are overweight. Females do tend to be smaller/lighter than males, but if she's a kitten she could be having a growth spurt. Be guided by the feeding instructions on the wet food to how much she should be having, but if she looks & feels right, she should be ok. The male probably appears to eat less as he prefers the dry biscuits which he can graze on all day like mine do, so won't be as hungry when you put the wet food down. Hope this helps
