I highly recommend Probiotics. They are safe from newborn and up. There is a powder form so that you can put it in her formula. If she has been on antibiotics lately for her ear infections, probiotics are definitely needed. Antibiotics get rid of all bacteria - good and bad. Probiotics replace the good bacteria so that she will be able to fight off infections. Just do an internet search for 'Probiotics' and tons of info will come up. I buy it at Whole Foods in the supplement/vitamin section of the store. They are in the refrigerated section.
I also highly recommend your daughter be adjusted by a chiropractor. My son used to have chronic ear infections.....for 5 months straight. He got adjusted ONE time, and has never had another ear infection. SERIOUSLY!! Seek out a chiropractor who specializes in children. We see Dr. Tricia Arndt in Dublin.
Good luck!