I wouldn't call it autism. If she's five years old and was used as a breeder dog, then she was probably not socialized, may have lived in a kennel etc. You may want to contact a rescue that takes in puppymill dogs. A good organization to ask advice from would be
www.puppymillrescue.com. They've seen it all and having had rescue dogs, I can almost guarantee that this is why she is acting as she is. A puppyill dog has never seen a toy. They have to be taught everything. They fear everything and anything. The not liking other dogs could also have soemthing to do with this. She may have had to fight for her food. Elaine