I am watching my nephew's kids once a week and he has two boxers. They are sisters who had a terrible start to life. Their mother died when the litter was only about 4 weeks old, and these two are the only ones who survived. Needless to say they didn't get the proper start in life and their immunity systems have been challenged because of it. One of them, Cookie, is battling mange and a nasty eye infection right now. I was wondering if anyone can suggest a supplement I can give to my nephew for her to help build her immune system? He has been to the vet and is medicating his dog. (Though I don't know with what.) I know her diet is going to need to change too. And I will address that with him as well.