Wow. I wish I had know about the baking soda when I had horses!
I liked the point of letting stalled horses see each other. I hate the "solitary confinement" stalls, and just being to see out of the door or a little window does not seem to make the horses much happier. We forget that horses survive by keeping track of everything going on around them.
This is a very good article. Thanks for bringing it to our notice.
I once had a friend who kept a small feed bucket in her horses' stall that just had about a cup of baking soda in it. She said that if they start to get a belly ache or anything they would start eating the baking soda. But would just ignore when they felt fine. Kinda like how dogs eat grass when their stomachs hurt.