My 13-14 year old Chihuahua has been eating raw food ( basically turkey, oats and carrots with salmon oil, Vit C, yeast, etc. added ). I would like to feed her a good canned food which is low in protein considering her elevated kidney levels, heart murmur and remaining one tooth. She is picky and recently decided not to eat the raw food. BTW, I always heat the raw food so it is a bit warm though still raw.
You might check Sojo’s freeze dried food. It’s relatively low in protein, as is Addiction dehydrated food, and The Honest Kitchen (Force, Keen and Verve). Otherwise, the canned food you are looking for will be in the 3.5 star and below categories of wet food.