It's good to read that Cincy is doing better and I hope the shots help her get over the itching.
My first Golden also had allergies. The vet gave her 19 shots in her belly (all numbered) to find out what she was allergic to. The result was that she was allergic to just about everything: grass, newspapers, dust, and many other things. It was very difficult to control, but this happened in the late 70's and I'm sure that by now there are many better treatments than over 20 years ago.
Best wishes for Cincy's quick recovery and a big hug to her.