You can literally give almost all food with less oil, no chilli. can give dry fruits soaking in water and then remove skin ( for badam, raisin , anjoor) and grind all and feed...it will be tasty for them. Give watermelon, mashed bananas, mashed apples, boiled vegetables, dal and rice, soft rotis. Don't force if it spits. Try after sometime. Give more water as well.