Pig Farming in Kenya: Why Piggeries Need a Management System

PSY: the number that tells you if your sow herd is working

Pigs weaned per sow per year (PSY) is the clearest single measure of how well a breeding herd is performing — it combines litter size, pre-weaning losses and how quickly sows return to service after weaning into one figure. Most small and mid-sized Kenyan piggeries have never actually calculated it, because doing so by hand requires tracking every sow's services, farrowing outcomes and weaning dates over a full year and doing the arithmetic across the whole herd.

Without PSY, a farmer is left comparing 'this sow seems to do well' against 'that one seems slow' informally, which makes it hard to decide which sows to keep, which to cull, and whether the overall breeding programme is actually improving or just staying the same while feed costs rise.

Farrowing losses are where a lot of the margin disappears

Stillbirths, crushing, scours and starvation account for a meaningful share of piglets lost before weaning on most farms, and the losses are rarely tracked by cause — just as a lower-than-expected litter at weaning. Recording farrowing outcomes properly (born alive, stillborn, assisted farrowings, and pre-weaning deaths by specific cause) turns a vague sense that 'litters seem smaller than they should be' into an actual, actionable pattern — for example, consistent crushing losses pointing at a farrowing-pen design problem, not a sow problem.

Feed conversion ratio decides whether a batch was profitable

For grower and finisher batches, feed is by far the largest cost, and feed conversion ratio (how many kilograms of feed produce one kilogram of live weight gain) is the number that actually tells you whether a batch made money. Two batches that look similar at sale — same number of pigs, similar weights — can have very different profitability if one consumed noticeably more feed to get there.

Tracking feed consumption against batch weight gain, rather than just 'how much feed did we buy this month,' is what makes FCR visible at all. Without it, a worsening feed bill is just assumed to be rising feed prices, when it might actually be a batch converting feed poorly due to disease, overcrowding or an imbalanced ration.

Meat withdrawal periods are a food-safety obligation, not a formality

Any pig treated with antibiotics or other medication has a withdrawal period before it can safely be slaughtered or sold for meat. On a farm tracking dozens of pigs across different batches and treatment dates, relying on memory to know which specific animals are still within a withdrawal period is a real risk — both to the buyer's health and to the farm's reputation if a problem is ever traced back. A system that automatically blocks a treated pig or batch from being marked sale-ready until the hold period passes removes that risk rather than depending on someone remembering correctly under pressure.

Biosecurity records matter more since African Swine Fever

African Swine Fever and other diseases that have affected Kenyan and regional herds have made biosecurity a genuine operational priority, not just good practice. Visitor and vehicle logs, disinfection and footbath compliance, and carcass disposal records are the kind of documentation a veterinary inspector or a cautious buyer may ask for, especially during a regional disease scare. A farm with no record of who's been on-site or how disinfection has been handled is in a much weaker position to demonstrate it's managing risk responsibly, compared to one with a clear log.

On-farm feed mixing needs its own cost tracking

Many Kenyan piggeries mix at least some of their own feed from raw ingredients to manage cost, but few track the true cost of a mixing run against buying complete feed. Without recording ingredient costs and quantities per mixing batch, it's easy to assume on-farm mixing is cheaper when, depending on current ingredient prices, it sometimes isn't — or the ratio has drifted from the intended nutrition plan without anyone noticing.

What a pig farming management system should cover

At minimum: a herd register with life-stage tracking, sow breeding and farrowing records that calculate PSY automatically, all-in/all-out batch management with FCR per batch, a disease and vaccination library with withdrawal-period enforcement, biosecurity logging, and a profit-and-loss report per batch.

Zinen Technologies builds a Pig Farming Management System for Kenyan piggeries covering this full range — whether you're running a breeding (weaner-producer) operation, a farrow-to-finish farm, or a pure fattening unit.