Will Falconer, DVM Moderator
I'll make this real simple, Yersenia. Nothing about this is "do it yourself" or "just give remedy X and all will be better.
You are dealing with chronic disease, and conventional medicine has no answers for this. Veterinary homeopathy does, but only by hiring someone professionally trained to manage your dog through it. See my Resources page for the AVH list, hire someone who does mostly or only homeopathy, even if they are no closer than your phone to talk to. Expect to spend months working to get this chronic disease on the way to cure.
Homeopathy can cure this, will careful work and a lot of focus on your part to pay attention to symptoms and how they change with each prescription.
Shortcuts? I know of none.
All the best to you and your animals.