We offer our goats free choice baking soda and mineral supplements. These are in a two bucket feeder inside their shelter. I find that the goats help themselves when they need it.
Baking soda helps the goat's rumen and prevents bloat. This Prairie Homestead article explains more about feeding baking soda to goats, in case you're curious. Please note, I am not an expert, a nutritionist, or anything else! I'm just a gal who has done a bit of research, sharing what I do. You'll need to regard your own situation to determine what would be best for you!
For our goats, we start with a base of Manna Pro Goat Minerals. I shop around for this. Sometimes it is cheaper at Tractor Supply, other times it is cheaper through Walmart or even Amazon.
I also add some Icelandic Kelp- which might sound odd, but it is loaded with nutrients- some probiotics and yeast. It is important to note, it is not baker's yeast, but rather a special type for the rumen. My go-to, need-to-know resource on all things goat is Fiasco Farms. Check out their info on Mineral Supplements.