I got this information about baking soda on Caprine Health, I had not heard anything negitive about baking soda before, I will look into it, thanks cmjust0
Baking Soda
A goat's rumen contains micro-organisms that thrive within a narrow acidity range. Feeds that ferment rapidly in the rumen increase its acidity. When acidity gets too high too fast, the micro-organisms multiply faster than usual, the rumen's balance becomes upset, and the goat gets sick. A goat's health therefore depends upon proper acidity. An alkaline substance such as sodium bicarbonate, or common baking soda, keeps acidity in check. A goat eats soda to keep the acidity within the proper range. Goats know when they need soda, and how much they need. All you have to do is make sure that they can get it when they need it.
A goat will eat an average of 3 tablespoons of soda per day, however they may need more during hot or humid weather. Higher temperatures cause the rumen to be more active, thus increasing acidity. At other times of the year they may eat little or no soda.