1. Farrowing pen 3 was sampled each day during a period of six days with a sampling time of 2 min. On day one 38 piglets were present; 11 one-day old and 27 neonatal. A total of 128 piglets (90 out of 128 are neonatal) were present on day 2 and 134 piglets (12 neonatal) were present on day 3