Tips for my fuzzy eater?

My dog gets tired of eating the same thing after 3-4 days. I’ve changed kibble foods, tried adding several toppers to keep him interested, which didn’t work, and recently started adding home cooked chicken with veg, rice, and homemade chicken stock to the kibbles. He still got tired of it after a few days.

I’m thinking cooking different types of meat to vary it every other day.

Any tips or recommendations you may have? Do you deal with fuzzy eaters? It’s highly frustrating.