Do not go near. Do not touch it, although its mother WILL accept it back even though it has been touched by humans. Its mother has gone for food. She will return to care for it much better than we can. Do not feed it.
Wild animals eat various kinds of food.
They can live only on food that is natural for their species. Never give them cow's milk. Call a wildlife expert. They will come to rescue and care for it. It is better not to touch it.