[Anonymous]

Regarding the water content, just soak the dry food in water in the fridg overnight, maybe add something to it as a topper when served. Canned food or a bit of cooked chopped chicken or lean meat.
If you are concerned about dental, brush the teeth once a day (see youtube for how to videos).

You might find some helpful information here too http://skeptvet.com/Blog/category/nutrition/
I did 🙂