1. 1. It was observed that piglets generally suckle the same teats and so form a teat order at suckling. 2. 2. The development of the teat order during the first day of life has been described. 3. 3. The size of the piglet was correlated with the size of the teat it accepted in the early teat order. 4. 4. The effect of the sow rolling over was to upset the stable teat order and to cause considerable competition between piglets before a new order was established. 5. 5. The use of temporary teeth played an important part in competition between piglets. 6. 6. Teats seemed to be recognized by sight, smell and the recognition of neighbours. 7. 7. The rigidity of the teat order has been discussed. 8. 8. Communication associated with feeding, warning, location and alarm has been described. 9. 9. The hair patterns of the sow assist the newborn piglets to locate the nipples.