[anonymous]

Quote: “I don’t know if I should keep giving her Purina Smartblend Ground food, or change her diet to something low-fat. Vets haven’t been helpful with that and I am very anxious and sad about all this, I want her to get better again but I don’t know if it’s even possible. Any help would be greatly appreciated”.

There are no veterinarians here. Even if there were, they have not examined your dog so it would be irresponsible for them to advise you.
For the best possible outcome take your dog to the nearest vet immediately for an accurate diagnosis and treatment options.