Mine get soaked organic non-gmo layer pellets as their main food. I stick to pellets as opposed to mash, because even soaked it stays together in little bite sized clumps. I do not ferment them, I tried it, but because of all of the probiotic in the feed, it turns yogurty, instead of fermenting. Their treats are mainly BOSS, green weeds from the yard and garden, and duckweed or water hyacinth harvested from our pond. Occasionally, they will get scrambled eggs, cooked oatmeal, yogurt, squash, or melon.