https://pubmed.ncbi.nlm.nih.gov/6380542/
Indeed, the cat appears to have less capability to adapt to most changes in dietary composition because it cannot change the quantities of enzymes involved in the metabolic pathways. This evolutionary development has resulted in more stringent nutritional requirements for cats than for omnivores such as the rat, dog, and man.
Biologically, humans are omnivores. Your suggestion would work great with other omnivores. I’m all for balanced healthy humane diets for the animals we are responsible for feeding! But not to the point of neglect.
https://www.reddit.com/r/veganuk/comments/zofsrh/comment/j0nku2i I apologize for this link to the “other” site, but I see lots of people parroting this argument, when the burden of proof that such crafted food actually exists and is available for consumers and any price point would be up to you.
Also, I searched and could only find suggestions for https://www.biocraftpet.com/ which synthesizes meat from stem cells, I’m curious what your take is on this approach.