A 15-month-old child who has a 3-day history of cough and rh…

A 15-month-old child who has a 3-day history of cough and rhinorrhea has developed audible expiratory wheezes and increased coughing. The child’s immunizations are up-to-date. The physical exam reveals a respiratory rate of 30 breaths per minute, expiratory wheezing, and prolonged expiration.  An oxygen saturation is 96% on room air. The child has had 2 wet diapers this morning but parent reports a decrease in appetite. What is the recommended next step?