Homemade Cooked Dog Food - No More Colorful Steamed Buns

My dog is seven years old and has been picky about dog food since he was around one. So, I've been researching homemade dog meals. I went through the unscientific colorful steamed bun phase to the strictly measured phase, and now I am more relaxed, meeting basic needs without obsessing over every gram. My dog's situation is as follows: he is a small mixed breed (his mother is a Toy Poodle, and his father's identity is unknown). He had parvovirus when he was around eight or nine months old, has a weak stomach, and suffers from heart enlargement, but otherwise, he is healthy. He consistently weighs about 10 pounds and eats once a day, roughly 180 grams, along with healthy homemade dog treats. He doesn't exercise much and is not neutered; I just can't bring myself to do it. 😭 Overall, my dog is primarily a carnivorous omnivore, with the basic principle being: over 80% meat and organ meats, and under 20% carbohydrates, fruits, and vegetables. The diet should include both red and white meats, and typical choices are chicken breast, duck breast, beef, and rabbit meat, which are all fairly common; there's no need to follow the trend of exotic meats like turkey, ostrich, or crocodile, just occasional variety. For organ meats, I choose chicken, duck, rabbit, and beef hearts, livers, lungs, and pancreases, and I often switch up the organ types. For carbohydrates, I try to avoid grains, typically opting for sweet potatoes, purple sweet potatoes, pumpkin, or quinoa. Sweet potatoes are my staple because I find they help mask any fishy taste. For dogs who haven't eaten raw food since they were young, many are averse to strong smells, and mine won't touch fruits and vegetables: broccoli and carrots are the top picks as carrots are especially effective for dogs that often have diarrhea. I don't understand the science behind it, but my dog found a particular carrot powder very helpful, so I experimented with feeding him carrots, and he now hardly ever has diarrhea. Other acceptable vegetables include spinach, purple cabbage, seaweed, and asparagus. As for fish, I use fish oil and substitutes like freeze-dried salmon, freeze-dried green-lipped mussels, and freeze-dried cod, which can be hard to find in Chongqing, and I occasionally add some fresh green-lipped mussels, which are very beneficial for my dog. Additionally, since this is homemade, there may be nutritional deficiencies, so I give him certain supplements like fish oil, berry powder, blueberry powder, CoQ10, dental powder, vitamins, and so forth, depending on my dog's needs.