Is the baby having diarrhea in that home related to Feng Shui?

What you want to ask is whether the baby's diarrhea at home is related to Feng Shui? This situation has nothing to do with Feng Shui.

The reason why babies have diarrhea is that their intestinal mucosal barrier function is poor and their immune system is relatively immature. Most babies' diarrhea is caused by non-infections, such as improper feeding, local gastrointestinal cold, food allergies, acclimatization, etc. Therefore, babies' diarrhea has nothing to do with Feng Shui.