Kim, this won't cure the cause of the problem, but it might help firm them up. Go to a drug store and into the vitamin/suppliment section and get lactose free acidobacillus pills. (OR, remind me to bring you some Sunday). It is a "good" bacteria. and with all the antibiotics killing ALL bacteria, good and bad, it sometimes helps to normalise the intestinal track.

1/4 tablet popped or crushed in food. once a day.

Worth a shot.