Oh geez poor Bowser!
kudos to you about just getting the stitches removed. I hope that is still healing well.
i am sure that others will weigh in on the home cooking, but I just wanted to lend some support. I am going through the same thing with my Wilbur (he even looks like Bowser!). I haven't tried home cooking yet, but we just finished the latest round of antibiotics for his epic infection chin acne and raw feet. After a year and a half of every grain-free food with different proteins... No idea what he is allergic to. I have finally caved and have him on prescription Hill's z/d food trial. I hope he can tolerate it, even though I hate this food. My goal is to stabilize him and then slowly introduce proteins to see what triggers him and get him off z/d. If z/d doesn't work, my vet will support me with home cooking for him (am lucky to have a great vet who listens).
I hope we both get this figured out!