I need to give my horse something like Sand Clear because I haven't in almost two years. I was at a friends house and she told me I could give my mare psyllium husk thats made for people from Trader Joe's and it was the same but a lot cheaper. The Sand Clear is pricey and if this stuff is the same I'd rather use it. How much do I use and is it the same? The Sand Clear is in pellet form but the main ingredient is psyllium. Can I feed my horse psyllium husk?