Answer: Hello dear. At 8 months, your baby can have as much as 6 ounces of juice a day to treat constipation. If yourbaby is old enough to eat a variety of solid foods, cut down on constipating foods like rice, bananas, and cooked carrots. Some Ways to Relieve Baby's Constipation-: First of all and actually most important is to Increase Water Consumption. Whether your baby is breast or bottle fed, it's easy to assume she's getting enough water due to a primarily liquid diet. Some other options are-:Offer Fruit Juice, Feed High-Fiber Foods, Give Your Baby “Bicycle Legs”, Try a Different Brand of Formula, Take Your Baby's Temperature, Massage Her Tummy, Give Him a Warm Bath Bananas, rice cereal, carrots, and cheese are a mainstay of most infant diets--they also tend to have a binding effect on stool. Foods like apricots, pears, prunes, peaches, and plums are better choices to help avoid constipation Hope it helps.