What can you give a 3 month old baby to gain more weight?

You can try whole milk because it has fat, but not to much or you might get it sick. If you don't want to give it whole milk, try feeding it a little more, but like i said BE CAREFUL!!! If u are still not sure, set an appointment with a doctor for a checkup.

I would agree with angelamartinez ^ but also I would suggest that u could try Farley’s rusk they are biscuits that u can put with milk which make them all mushy for the baby to swallow and eat