This post may well be better suited for the biology or medical sciences Stack Exchange.
For safety, and, also, because, there may be more dieticians on this site, if, they may be helpful (perhaps or maybe, not, but maybe yes), but, especially, because, this post may be better suited here, sorry.
I am trying to construct an external biological digestor for cats. This, would be, an animal, that processes some vegan food (or, at the most, vegetarian), and turns it into the lowest common denominator of broken down elements that both the cat (normally, not vegetarian), can digest, with, success, and producing vitality, for the cat, and the food is not delivered from a carcass.
How, can I construct, such a food generator.
I repeat, the generator, biological or otherwise, takes some vegan food that the cat cannot process, breaks it down (like, an external stomach), into food that the cat's internal digestive system can digest, with benefits, for the cat, and the broken down food is fed into the cat (bypassing the cat's stomach).
Why, is this possible, (or, if not, then why not)?