Are you getting your 10% of organ meat, too? I see mostly muscle and bone in your diet description.
Ditch the Billinghurst info. He was one of the first to write about raw feeding, but cod liver oil is not good. You want a good quality salmon oil, preferrably one that's cold processed. I love Grizzly Salmon Oil, and both cats and my DS get it, each meal. Then, you need to give Vit E, if you feed Salmon oil, since they use up a lot of the available Vit E in their systems in metabolizing the salmon oil. How much Vit E depends on weight (my cats get two
drops, twice a week; Geyser, at 50 lbs, gets 400 IU daily; make sure to use
mixed tocopherols, however that's spelled

).
If I only used one supplement, it would be the salmon oil/Vit E combo (OK, that's really two, but you get my drift).
I also feed kelp and alfalfa powder, diatamaceous earth (none of them every has worms), a good quality probiotic (really makes a difference; helps the cat with flea dermititis, and Geyser's poop is much more consistent when she's taking it), and for Geyser, another product called Flea Free, which is a ton of vitamins in liquid form. I don't use Frontline or any of the topicals, and she doesn't have any flea dirt on her, let alone fleas.
Could they do without most of that stuff? Probably. While I heartily disagree with the decision, they could probably eat Ol' Roy and do fine (ha ha Judith). But, I feel good about their diets and know they're getting what they need for their bodies to do their jobs, well.
And, reading what the Experts say about raw feeding is the same as anything else (training, etc.); everyone has an opinion, and is certian their opinion is the ONLY way to go

. You really have to watch out for the Purists that live everywhere...the raw feeders who are Only Whole Prey and Nothing Else are among them. This is where you have to decide which experts you are going to stick with and then not worry too much about it.
Back to your original issue...dry skin. Try some good salmon oil and stick with it and see what happens over time.
Of course, all of this is only my own
