Seriously speaking, most of the animals that were turned into friends are either vegetarians or at least somewhat omnivorous, and even the couple of hypercarnivores may have been given some tolerance for digesting plant matter, so the buns are probably just steamed vegetable dumplings.
Although, unless Kaban has the capacity to synthesize Vitamin B12, she may be the only one in trouble...
Seriously speaking, most of the animals that were turned into friends are either vegetarians or at least somewhat omnivorous, and even the couple of hypercarnivores may have been given some tolerance for digesting plant matter, so the buns are probably just steamed vegetable dumplings.
Although, unless Kaban has the capacity to synthesize Vitamin B12, she may be the only one in trouble...
Wasn't it explained that Japari Bun had all the nutritional stuff so the Friend will be content to it?