A 3-month-old previously healthy male infant presents in winter with a 2-day history of coryza, cough and increasing work of breathing. He is feeding slightly less but has good urine output. On examination, he has mild subcostal recessions, respiratory rate 52 breaths per minute, SpO₂ 95% on room air and scattered crackles and wheeze. According to the Canadian Paediatric Society bronchiolitis statement, what is the most appropriate management?