My son will be 14 months on Christmas. Is it okay that pretty much the only liquid he gets is breastmilk? I have a heavy let-down, and he nurses 3-5 times daily & is still a night nurser. I give him water in a sippy with his meals, and although he can use a sippy he rarely wants it. He eats plenty of fruit but no juice. He's a chunky baby and has many wet diapers. Is this a normal situation?