Oh! I see you are doing it only a few times a week? Does that mean you are using dog food the rest of the week? There might be less strict requirements for supplement feeding, but I'm not sure since I don't home cook. Again, Hopefully, some of the more experienced will chime in here.
I just know that there are strict nutritional needs for pups, which is why I don't personally home cook lol. I'm not up to the challenge!

I admire you for being so ambitious!