The PAL canned chicken casserole that I use is mainly gravy. So a very little of that is enough to just get the taste (& smell?) thro' the dry food. Means that 1 can will last quite a few days (kept in the refrigerator).
But the Tibbies get their correct portion of dry food & actually eat it this way.
You're right about a whole list of dry food being available...& it's a matter of finding one that your own dog will eat & which is also nutritionally good.
There was a survey on one of the dog sites here in Oz, asking people what dry food they & their dogs preferred. The product, Supercoat, came out on top...but I think it may only be available here.
I'll ask the really good Tibbie breeders here if they know & use any of the dry food products that you've listed, Evelyn. A couple of them also breed Shih-Tzus.
I'll get back to you.
Marie