When I had cats, I made my own, quite a few cats. I found out a product Vege Cat, also Vege Dog, that supplies all the nutrients needed for them, to make cat or dog food at home.
My cats thrived.
Dogs and cats are not vegetarians. Especially cats. One of the worst things you can do to them is put them on an all plant based diet. I hope you are adding meat.
BTW While we are on that slide -
Employment opportunities for animal lovers: We still need a Vet Tech, a dog groomer and a DVM here. A rotating DVM would be a huge help. What would be great is a mature, reliable animal lover with retail skills...Too much to ask?