I cook for my pets also, so I'm curious how you deal with this.
I use the vegecat supplement this place sells:
A person - actually mother and daughter - who have been very active in animal rescue, recommended this to me. I’ve been making my cats’ food for several years and the vet I’ve taken them to says they are well nourished and healthy (except for a genetic thing, they are the offspring of feral cats).
I don’t use exact recipes per se, but have a basic standard one and then add the vegecat supplement, and give them bits of this and that, plus they catch lizards, mice, and assorted bugs.