Hi, I am really so sorry to hear about your loss, I can't even begin to imagine the pain
I've been homecooking for over 3 years now and it is a learning process, you will most likely have to supplement daily and find what your dog will eat/likes/ doesn't like, etc. , basically, its a process of figuring out what works for her, just like many people try several dog foods until they find one that works.
If you have been feeding kibble, keep in mind that you'll be dealing with runny stools for a few weeks until Bella adjusts her water intake DOWN, they will instinctively begin to drink less water because they are receiving water through their food, that's one reason it is difficult to vascillate between wet and dry foods.
Make this store a favorite* http://www.onlynaturalpet.com/
They have great supplements/vitamins at reasonable prices, right now I have her on this:
Plus probiotics, Integrative spectrum (they make capsules you can sprinkle small amounts) and CoQ10, a few other specific supplements, and you can also buy some veggie mix to mix in with the meat, Dr. Harvey's makes a good one:
Its dehydrated and relatively easy. I usually mix chicken with this veggie/rice cereal/ supplement mix that I make, sometimes I'll feed her beef or venison, lamb or buffalo, but mostly we do chicken
There is also a homecooked group on Yahoo with tons of recipes on homecooking. http://pets.groups.yahoo.com/group/Dog_Food_Recipes/
If you go to Yahoo groups and search dogs + food, you'll find several more and people who homecook for dogs with cancer and other ailments.