What would be healthy baby weights? Mine are about 3 weeks old and my male is about 47-48g and my female is 40g. I think they are way to small. I am feeding them according to there weight and they are very active and very good eaters. I just am not sure if they are maybe not "fat" enough? the whipping cream upsets their stomach so I have not been using that. As for right now I am in the process of weening them off the homemade formula recipe and transitioning them into the FV. I am sure the FV will plump them up I am just looking to know what they should be weighing.