My puppy 12 weeks old has dry itchy skin when we first got her we chalked it up to all the fleas that were on her. After a very long time of picking all the fleas off she has been flea free for about five weeks. However the insistant scratching continues. She scratches herself raw and whines and now has a red bumpy rash on her belly and back legs. Can we use baby lotion or any suggestions on what to do. We are considering changing her diet to a more natural diet thank you for your advice in advance.