Questioning mothers about their children's abilities. I don't like com…

Questioning mothers about their children's abilities. I don't like comparing children, but I'm already starting to worry. My son doesn't talk yet. He knows about 10 words roughly, but speaks unconsciously. Answers questions like "What does a cow do?" "Ba" he says, and "Meow" for a cat. Knows about 3-4 animals. Physically active and strong. But no pointing gesture, refuses to eat on his own, sleeps with diapers at night, and sits up during the day. Doesn't follow commands, but stubborn when he wants or needs it himself. If hungry, he says "am-am", wants water "b'uv", says "give", if descending from