I buy capsules and pierce them with a needle. I add this to Zoe's food once every other day. No dandruff, and her coat is super soft. I don't buy a cat specific formula, I just picked this bottle up at Target.
Hope all is going well with the chicken breast. I have been supplementing raw into my cat's diet for two years. I generally feed two meals a day, when I add raw, I feed it as one of two meals for the day. No need to add anything else to that meal. Keep us posted!
If you're comfortable without pre-made, try offering a chicken wing. If not, there a lot of pre-made mixes to choose from. Just because your cat does not like what you have offered so far, does not mean that your cat will not - does not want to eat raw.
The owner of In Clover came to Seattle and gave us (a MudBay employee at the time) a presentation on her product, OptaGest http://www.inclover.com/optagest_cats.html
The science behind it makes sense.