I would just walk her multiple times a day if possible. Take her along a grassy stretch and let her graze at spots you have pre picked to get her respect your authority. If there are hills all the better. Get her to flex and give to you. Move her hind and fore. Practice backing. I don't know what is available in your area feed wise but realize that the Equistages is only 1260 calories a pound and the Country Rd fat supp tells you on the back of the bag only 2080 cal per pound is digestable (130 calories per ounce) that isn't going to put weight on any horse unless you feed it by the pound. Their suggested I am having trouble reading but I think it says 2 ounces. That would be 260 calories for a horse that needs 15,000 to maintain. She needs much more to gain. The probiotics are a good thing and if there is significant O3 then that is good too. There are better products for your money. Sometimes it is cheaper to feed the expensive feeds as they are higher quality, digest better and the horse is able to actually utilize the calories. The Ultium has 1800 calories per pound for comparison to the Equistages 1260 (and much of that may be sugars or undigestable). Ultium also has something to buffer which aids in preventing or soothing ulcer prone horses. The Manna Pro has twice the fats and over 1400 calories per ounce. I couldn't find the Country Roads product to see an ingredient list.