Building A Strong Foundation for Wean-To-Finish Survivability

Friday, May 22, 2026

By Nat Stas, PIC Wean-to-Finish Technical Services Director

Wean-to-finish survivability has become a growing point of pressure for the swine industry. As pigs grow, losses carry a greater financial impact, eliminating value already invested through genetics, feed, labour, and facilities.

Across the industry, recent survivability trends show a mixed picture. Many systems have made progress in early post-weaning phases, reflecting stronger preparation and early pig care. At the same time, finishing mortality continues to trend upward, which is the most concerning from a cost standpoint.

Accurate mortality analysis creates focus

Farms that make progress in survivability often begin by taking a closer look at when and why pigs are being lost. Reviewing when losses occur, identifying patterns across flows, and understanding underlying mortality causes within specific stages of production helps narrow down where attention and resources can make the greatest difference. Mortality data is most useful when it helps explain what is happening during a specific window of production, rather than serving as a summary after the fact.

When losses are evaluated this way, teams can focus their efforts more effectively. Instead of reacting broadly, teams can prioritize the factors influencing survivability during that stage of growth. This approach does not eliminate challenges, but it helps turn concern into targeted, repeatable action.

Building a strong foundation

The first days and weeks after weaning are a critical and stressful time in a pig’s life. During this transition, pigs are adapting to new environments, new social groups and new feeding and watering systems all at once. Effective early pig care reduces stress, supports growth and improves performance through finishing.

Preparation before placement

Early pig care starts before weaned pigs ever arrive at the site. Preparation includes both facility readiness and communication with the sow farm to understand the quality of pigs expected at placement.

Newly weaned pigs are more susceptible to pathogens left behind by the previous group, making thorough cleaning and disinfection essential. Allow barns to dry completely after washing; disinfectants are only effective on clean, dry surfaces. Pigs should never be placed in a wet environment. Beyond posing a health concern, moisture increases the temperature sensation pigs experience, making them more susceptible to chilling.

Rooms should be warmed 24 hours before placement to ensure floors, mats and equipment are at the correct temperature. Feeders, drinkers, ventilation and heating systems should be checked prior to arrival to confirm they are functioning properly.

Creating a comfortable environment

The environment pigs enter at placement has a direct influence on the transition. Newly weaned pigs are highly sensitive to temperature and air movement, placing greater importance on early environmental control.

Comfort zones provide pigs with access to a warm, protected microclimate while allowing flexibility within the room. Zones should be sized so all pigs can lie comfortably without piling. Pig behaviour offers immediate feedback: pigs lying one to one-and-a-half deep generally indicate acceptable comfort, while piling two to three pigs deep often signals pigs are too cold. Pigs spread far apart can indicate excess heat.

This approach also supports effective ventilation management. By providing a warm resting area, overall room temperature can be set lower, allowing for increased airflow without chilling pigs. This balance helps maintain air quality and control moisture during the first days after weaning, as elevated humidity can create a damp environment, increasing the risk of chilling and piling. Ventilation decisions should be guided by pig behaviour and barn conditions rather than controller settings alone.

Supporting early water & feed intake

Drinkers should be ready before pigs arrive, with proper height and flow rate to support easy access. When water flow is inadequate or when drinkers are poorly positioned, pigs may delay drinking. Adequate access points help reduce competition and support consistent hydration during the early post-placement period. Pigs that establish drinking behaviour are more likely to begin eating, making water intake the primary focus initially.

The transition from a liquid diet to solid feed is one of the primary challenges pigs face after weaning. Mat feeding is most effective immediately after placement and should be used as a training tool to encourage exploration rather than as a primary feeding system. Offering small amounts of fresh feed multiple times per day helps stimulate intake, while excessive mat feeding can train pigs to wait for the caretaker instead of seeking feed on their own.

Feeder pan coverage should be maximized during the first days post-placement, and feed should be kept fresh and accessible. Pigs that begin eating and drinking consistently early are better positioned to maintain growth and health throughout finishing.

Even with proper preparation, some pigs will require additional support during the transition. Upon arrival, pigs should be sorted into appropriate placement plan groups. Typically, 10 per cent to 20 per cent may be sorted due to smaller size, five per cent to seven per cent due to health concerns, and 10 per cent to 15 per cent reserved as rescue pens for 48-hour pulls, with the remaining pigs forming the general population. Strategic sorting helps ensure pigs receive the level of care and interventions they need from Day 1. Targeted interventions, such as gruel feeding, can assist weak, sick or fallback pigs as they adapt to solid feed and water (see Figure below).

Communication supports survivability

Wean-to-finish survivability is influenced by sow farm factors before pigs arrive at the wean-to-finish site. These include pig health, wean weight efficiency (see sidebar) and group variation coming out of the sow farm.

Clear communication before placement helps wean-to-finish teams prepare more effectively. Advance awareness of pig quality or variability allows sites to plan space, labour, nutrition and care strategies, reducing surprises once pigs arrive on site.

Looking ahead

While new tools and technologies may support earlier detection of issues, the largest gains continue to come from fundamentals: understanding when and why pigs are lost, investing in early pig care and maintaining alignment across the production system.

Ultimately, wean-to-finish survivability is not driven by a single decision or solution. It reflects how well genetics and management work together to protect value, manage risk and support pigs from placement through market, with early observation and timely adjustment playing a key role in keeping pigs on track. BP