Our JR , now 13yrs, has started to develop scabs/sores on her belly and also her fur. We are buying an expensive shampoo via the vet, and though this initially showed some results , the problem is starting to get worse . Millie has always been spotlessly clean and she continues to look after herself. she is starting to show her age and is now taking tablets for rheumatism. Any suggestions for a home made potion we can try, please?. ta