The most likely cause of gassiness in a fullly breastfed baby is milk and other dairy products in your diet. For about 2 weeks, eliminate all sources of dairy including milk, yogurt, cheese, and hidden dairy such as milk based ingredients in baked goods, etc. (read the labels). See if that helps solve your baby's problem. I definitely would not give any other substances such as Karo or herbal remedies to your baby. Anything else that you give her interferes with the perfect breastfed state of her intestinal tract, introducing foreign substances that could cause problems. Let me know if eliminating dairy products helps or not, and if not, I will make suggestions for other things it might be. Good luck! :-)