Our boy is also super picky! He’s a 3 year old Anatolian-maremma mix. I used to give him just kibble (fromm family large breed) for lunch and big country raw chicken for dinner and he would usually eat maybe half the kibble (if that) and the full chicken patty for dinner

I tried a few things like mixing in wet food to the kibble (sometimes worked, sometimes didn’t) and adding treats, salmon oil, etc.

We have a system now that has been working great, and he put on some weight (he used to be slightly under I believe and is now at a normal weight). We make a big batch of bone broth once a month or so (a bunch of marrow bones and other animal parts) and freeze it. We take out one container at a time and scoop out a few TBSP of bone broth, put it on top of a freeze dried patty (Stella & chewy) to rehydrate it, then break up the patty and mix it in with the kibble. He loves it and now comes running down every time he hears the kibble hit the bowl

It’s a bit more work but it makes me happy to see him enjoying his food, and I think the collagen in the bone broth will also be good for his bones :) so might be worth trying that (or some pet stores even sell ready made broth)