By Jeffery Blythe, DVM, Pipestone Veterinary Services
Modern swine production demands more than simply moving pigs efficiently from one barn to the next. Health pressures, labor constraints and tighter margins have raised the bar for how we manage our systems.
Pig flow is one tool I’ve seen continue to prove its value, especially at scale. Pig flow, often called the pig wheel, is simply the planned pattern of how pigs move from the sow farm to shareholder barns over time. When designed with larger, well-coordinated flows, it becomes a powerful driver of herd health, biosecurity and long-term performance.
From my perspective, the pig wheel delivers two critical advantages: true all-in/all-out production and tight, uniform age groups. Over my 30-plus years working with producers, I’ve seen how these fundamentals consistently pay dividends and contribute to meaningful improvements in swine health.
Rest and Reset
All-in/all-out production gives each facility a clean starting point. When pigs move through a barn as a single group, we can interrupt disease cycles that persist in continuous-flow systems.
A larger pig wheel supports this by maintaining proper downtime; barns aren’t pressured to accept pigs early or hold pigs late. This allows facilities to be completely emptied, washed, disinfected, and allowed to dry before the next group arrives. That “reset” lowers pathogen load and gives the next group the best chance to succeed.
Over time, using all-in/all-out in this way reduces baseline disease pressure across production systems.
One Age, One Plan
Tight age uniformity is another cornerstone of the pig wheel’s health advantage. When pigs at a site are the same age, we can apply health and nutrition programs more precisely. Diets match pig size and stage of production, helping nutrition programs perform as designed rather than being compromised by wide weight or age spreads.
On sites receiving 1,300 weaned pigs on an all-in/all-out basis, preventive care becomes much more efficient. Vaccinations can be given to the entire group shortly after placement, putting all pigs on the same health platform. Managing the group this way reduces labor, minimizes stress on pigs, lowers the risk of missed or delayed doses and helps us make better use of supplies and equipment.
Uniform age groups also simplify diagnostics and nutrition adjustments. When pigs are at the same stage of production, we can identify trends faster, intervene earlier and evaluate outcomes more accurately.
Healthier Pigs
Pig flow and health are closely connected. Overcrowding, delayed movements or mixing groups increase stress, something I often see as an underestimated driver of disease expression. A larger pig wheel keeps barns stocked as designed, maintains proper timing and reduces stress, which supports immune function, vaccine response and consistent performance.
Predictable pig flow also strengthens everyday biosecurity. When movements are planned and consistent, staff can follow cleaning, equipment use and people-movement protocols without cutting corners. Physical separation between groups is maintained, cross-contamination is reduced, and outside traffic, like service visits or deliveries, can be coordinated around pig movement, lowering the risk of disease introduction.
Over my career, I’ve seen how larger pig wheels help move us forward in swine health and production. They don’t eliminate challenges, but they consistently put producers and the industry in a better position to manage them.
In today’s production environment, success isn’t about one big change; it’s about stacking small, repeatable advantages. A larger pig wheel does exactly that. By supporting all-in/all-out production, tight age uniformity, efficient use of labor and resources, and practical biosecurity, it creates a system that consistently sets pigs up to stay healthy and perform.
Over time, those advantages add up, not just for individual operations but also for swine health across the industry.
