"Rabbit pellets are somewhat easier to chew, so I
use them as part of the mix I feed those who need weight gain, along
with beet pulp, rice bran, senior horse, and llama pellets. Most
pellets are alfalfa based, the differences being in mineral and
additive content. The rice bran does seem to make a difference.
Seal makes an equine senior supplement called "sentinel senior" (used to be
called "vintage senior) that works by itself without any other supplements.
It's easy to chew, even for animals with no teeth (extruded). It's like
cheese curls in texture".
"Cracked corn adds calories
and heat, shredded beet pulp adds calories".