Bicarb is alkaline so will reduce acidity like lots of other mineral antacids. The only problem is using strong alkalisers can have a rebound effect and actually lead to increased acidity, so I would only use small amounts, and prefer a herbal or systemic approach myself.
You could yes, in as far as it goes. But I prefer a product with back-up Iodine and Methionine as well as a full spectrum of B-vits and a higher Biotin level, so I go for TopSpec and add Magnesium as required.
The first has nearer the kind of levels I would recommend using on an ongoing basis without any forage analysis. As a guide I recommend TopSpec Comprehensive to my clients with horses with Metabolic problems.
The problem with 'natural balancers' is that they are a contradiction in terms. Most diets need 'balancing' with the addition of the trace and macro minerals that may deficient in the diet, and because you are trying to make up for the lack of a substance in a large amount of forage or grass...
Yes, I developed my own blend in the end which includes slippery elm. Make sure it is pink and fluffy - there is some fake brown material around. Aloe vera is very helpful too, you can buy that in juice form at health food shops, but make sure it is marked as certified by the Aloe Science Council.
Pain/stress issues definitely need to be ruled out, but unfortunately some horses do relapse several times after treatment for gastric ulcers, and may need dramatic changes in diet, management, and even some kind of maintenance product in some cases. I recommend a herbal approach to soothe and...
It's a build up of sediment in the opening of urethra forming a firm plug. If they're fairly small they are easily removed and I recommend Lubigel/KY Jelly for cleaning and bean removal, it's totally non-irritant and doesn't have to be washed off.