Hmm, good to know about the water thing! I'm not sure what they would think about sloppy food.
As far as doing partial raw, partial kibble, partial canned.. how much variety do you bring in? I don't have set foods they eat. I grab a bag of Canidae GF, Earthborne GF, Wellness Core, Acana, ect and try to mix up proteins so they aren't lacking in vits and minerals as well as mixture so they don't get bored. If I wanted to try some raw every now and then (maybe once or twice a week), would it be best to stick with boneless? Chicken and/or turkey or doesn't it matter?
They do get RMB's every few weeks and I've been known to feed raw chicken or goose or venison for treats, so raw isn't completely weird to them.
Also, do you tend to mix up proteins in the canned food? I feel like I'm thinking about this too much.