I have been there, I feel your pain! When my son was a baby/toddler, he had 7 one winter! They actually did put him on a 'maintenance' antibiotic for something like a month. I hated doing that, but kind of didn't know what else to do. When they get an ear infection, it takes a while for the fluid to drain out. If they get another cold while the fluid is still present, they are extremely susceptable. Generally, you have to sit tight until that winter is over and they are less likely to get colds. I can't say whether the maintenance med. was the way to go or not, or if you are better off treating them as they come, but either way I would be really pushing the probiotics to keep her gut as healthy as possible. Of course, anything you can do to keep her from getting another cold for as long as possible is well worth it! My son almost had to have tubes, but drained enough fluid off at last, and eventually his own tubes grew enough that he quit getting them. I made sure over the years that he had plenty of acidophillus. Now, at nearly 16, he is healthy as a horse with no residule effects from this. He rarely gets sick. In fact, out of my 3, he gets sick the least of all of them. I think he's been on antibiotics maybe 3-4 times since then, total! Good luck, I'm sure you'll figure out the best thing for your daughter!