My baby is just 2 1/2 weeks old and we are having problems feeding. My baby is never full. Wanting fed every 3hours and sometimes sooner. Each feed he is having 90-120mls of cow and gate. We are using cow and gate number 1 tin. Tonight we used cow and gate number two tin to see if that wld fill him. But no. Please help. I'm stressing out. What am I doing wrong.