There is not much you can do at home without knowing what is causing the hair loss around the eye. When you take your Rott puppy in for her rabies vaccination, ask the vet to scrape the skin around the eye and look for Demodex mites.
There are many alternative treatments for demodicosis, including some topical medications that may or may not help. Do not subject your puppy to the toxic dips that are sold for mange. If you want to treat her most effectively, she can be given ivermectin orally.
If you are really strapped and cannot afford to have this diagnosed, you can sometimes treat patchy Demodex infections in Rotties and Pitbulls with "benign neglect." No treatment is used at all, and most of the puppies will just grow out of the problem as their immune systems become more competent. I am hesitant to suggest this method since I have not seen the puppy and am not even sure if this is what the problem is, so if you are worried about this you should find out what is going on before making this choice.