Infant case: difficulty breathing, chocking, not feeding well, fever last week, sleepy, whistle noise when breathing no secretion. What could it be?

Bronchiolitis. Have your baby checked. Most of bronchiolitis in infants requires supportive cares. However, if infant's oxygen saturation runs below 92 percent or infant became dehydrated from inadequate feeding, hospitalization will be necessary.
Vaporizer. Your child has a viral illness which sounds like RSV the most important thing for your child is vaporizer check with your physician. He may have other things he would like you to do.