Feeder design significantly affects competition and welfare in pig pens. Evidence-based feeder specifications reduce aggression and ensure all pigs feed adequately.
Pigs unable to access feeders without competition experience both hunger and aggression injuries. Feeder design that allows adequate space and reduces the ability of dominant pigs to monopolize resources ensures equitable feed access for all animals. Good feeder design is an easily implemented welfare improvement with documented effects on aggression and growth uniformity.