Table 1 Scoring systems used for the application of exit criteria

Respiratory score

No clinical signs of respiratory disease

Breathing frequency of 35–55/min and/or occasional coughing

Breathing frequency of 56–90/min and/or multiple coughing periods within 10 min and dyspnea

Breathing frequency > 90/min and cyanosis or gasping or open-mouth breathing or breathing frequency > 90/min and cyanosis and gasping or open-mouth breathing

Depression score

Active, alert, normal ingestion

Calm, alert, decreased ingestion

Dull, increased recumbence, increased reaction time, still moving to the feeding trough but without or only small feed intake or dull, sitting like a dog, increased reaction time, still moving to the feeding trough but without or only small feed intake

Apathetic, no reaction to stimulation and/or shaky movements without lying down and/or standing with head down without lying down and/or vomiting and/or foam around nostrils and mouth