if she is getting alot of ear infections I bet you its from milk. Don't know why, but milk seems to be a culprit for it. I've had kids who decreased the amount they would drink and amazingly the ear infections also went away.

also, is she sick or is it allergies. Do they have pets, maybe mold or do they change their furnace filter. I have had some kids who are sick and its because the filters have been so clogged. Also is she getting enough sleep and eating good too.

its hard when they are part time, but if you can fill with full time I would. Also, if she is sick all the time are the parents taking the time off, I'm wondering if they are shopping around for another daycare.