Complex sentence: When dehydration is severe, the therapy also includes supplemental zinc for two weeks, encouraging the dehydrated person to eat to speed recovery of normal intestinal functioning, and having family members and caretakers learn the signs of worsening dehydration.
Split into simpler sentences: When dehydration is severe, the therapy also includes supplemental zinc for two weeks. The dehydrated person is encouraged to eat to speed recovery of normal intestinal functioning, and family members and caretakers are taught the signs of worsening dehydration.