Given what has happened to her, she could be weak from her hypoglycemic episode but I don't see that translating directly to anemia. Parasites could do it if there was a heavy infestation. Possibly the combination of the 2 has got her down. Did the vet diagnose anemia through blood work or just by examination?
You could try boiling some liver and using the broth from it for her. You could put it over her food and she may well eat it on her own. It is very iron rich and will help to build red blood cells.
Hopefully she's just had a rough start. There is a type of anemia that is auto-immune related (AIHA). If the anemia is persistent, this is a possibility. Here's a link with a little introductory info to it.
Immune Mediated Hemolytic Anemia in dogs - Chinaroad Lowchens of Australia
You may want to ask your vet about this. He/she will likely just want to get her over this hump and treat the symptoms for now, but, if the anemia is recurrent, AIHA is a possibility.