Hello I have 3 baby chicks that are 3 weeks old. One is not eating much. She stays crouched up under light. I made sure temp was at 90 degrees..she is having bowel movements that are normal and she is drinking. Sometimes she goes days without food. She even walks in the crouched position. Put probiotics and vitamins and electrolytes in her water? Someone told me to put apple cider vinegar in water? Should I give her sulmet? Don't know what to do?