If this is pancreatitis and the vet did not suggest IV fluids, I would seek a second opinion.
As for home cooking, it is great as long as you do it correctly ie: your pups need balanced diets with the right supplements. A great website to read:
Welcome to Pet Diets
You can also obtain diets for healthy dogs at:
www.balanceit.com
I will keep Sadie in my thoughts and prayers.