Dear doctor.. My son is 2 and half years old.. since from birth he couldnt suck enough the mother milk.. means in all activities very slow.. later till now he is taking spoon feed only.. no solid food.. we tried a lot.. but negative response... he is fearing to take any solid food in his mouth.. if we feed even a grape, immediately he tends to vomiting.. And also he is not able to walk fluently.. he didnt crawl at all.. straight way he started walking at the age of 1 and half. He got up himself from the bed after his 2 nd year.. before we used to lift him.. if we check him, we feel his head is weighing more.. that is why he is not able to balance.. even when he runs, he cant stop immediately.. cant balance.. falling down.. We bought a tri cycle.. till now he is not able to pedal it.. just sitting on it.. What will be the basic problem with him? pls help me..