How Can I Improve My Toddler S Indigestion And Poor Appetite?

My daughter is 3 and half years, how can I improve her digestion and apetite. She doesn t take varieties of foods - vegetables juices also, only known kinds she takes, she don t want to try new ones, other than water, maaza, sprite she don t take take even juices. In vegetables , mainly okhra and carrot, sweet corn, What to do? Bowel is also foul smelly, undigested, 3 to 4 times a day sometimes loose motions sometimes hard balls