Well, duh!! It says ration balancer right on the bag, if I would only learn to read.
Yes, apparently it does. A few years ago I tried feeding him 3-4 soaked alfalfa cubes with his balancer and even that little bit made him want to bolt off with me every time I rode him. I can’t prove that the alfalfa was the cause, but the problem began when I started feeding those cubes with his balancer, and resolved when I took him off the extra alfalfa. I’ve looked for plain timothy cubes or pellets, but none of the stores near me (Tractor Supply and local farm stores) carry it. Everything they stock contains alfalfa.
Yes, this is why one option is to just go with the oats/cracked corn until I can get oats again. It’s definitely the cheapest option ($12 for a 50# bag). The sudden unavailability of oats made me wonder what others use for a filler; hence my question in the original post. And now I’m also thinking I could experiment with different fillers just to give them some variety.