My small breed with a sensitive stomach does well on Nutrisca salmon and chickpea kibble as a base (along with treatment from a dermatologist). My other dogs like it as well. See reviews on Chewy dot com.
I don’t rotate, as my dog with a sensitive stomach vomits when I make a change.
On a fixed income, I pretty much eat the same things every day, it’s working for me, lol
Seriously, I would comply with the prescription food, at least until the dog is stable, then add other things, with your vets approval.
