The number of pigs that can use a round feeder depends on its size and placement in the pen. When the feeder is placed too close to dividers, that section of the feeder is more prone to being fouled. Low flow rate may cause pigs to fight, reduce consumption and reduce rate of gain. Some pigs may just give up and not compete for feed. Heavy flow rates on the other hand become a costly waste.
Fines tend to build up, moisture collects, and excess feed deteriorates in quality.
Some feeders have limited adjustment ranges. This adjustment should improve rate of gain, compared to limited feed or too much feed in the feeder bottom. Less time and labor is needed at this setting. Don't restrict flow too much. Low consumption can be more expensive than a moderate waste.