Any poo today?

Tien has not been pooing daily recently. The last time she poo was two days ago, which had been accumulated for three solid days. There could be a couple of reasons to that, and I'm figuring which is the trouble maker. She had her milk powder changed about a week ago. Didn't want her to drink those formulated for 12 months and below. Worried that it will be too nutritious for her. She had already exceed the plot area of her health booklet. I'm hoping it's those medicine that's causing the constipation. She had been on antibiotics for her sore throat, cough and running nose. Let's see if the poo-poo routine will go back to normal once she recovers from her illness.