Pig production is among the most intensively monitored sectors of livestock agriculture in terms of production metrics — feed conversion, growth rates, mortality — but welfare monitoring has historically lagged behind. A sow with early-stage lameness, a pig showing early signs of tail biting, or a group experiencing heat stress might go undetected for days in a large commercial facility. Technology is changing this.
The convergence of affordable sensors, computer vision, machine learning, and wireless connectivity has created a new generation of on-farm welfare monitoring tools. In 2025, these tools are transitioning from research settings to commercial deployment, with several systems now commercially available in Europe, North America, and Asia.
Computer vision systems using overhead cameras and AI image analysis can now detect specific pig behaviors associated with welfare states. Commercial systems in use in 2025 include:
Key commercial providers in 2025 include SoundTalks (respiratory monitoring), Fancom, Big Dutchman, and spin-offs from Wageningen University's precision livestock research programs. Several systems integrate multiple monitoring streams into unified welfare dashboards.
Emerging research from the University of Veterinary Medicine Vienna has developed pig facial action coding systems (pigFACS) analogous to those used for pain assessment in other species. In 2025, the first commercially piloted systems using pig facial expression for pain and stress detection are being tested in European markets, though commercial validation is still underway.
Pigs are highly vocal animals whose vocalizations reflect emotional states. Research at the University of Copenhagen has demonstrated that pig vocalizations can be classified into positive and negative affective states with machine learning — pigs produce different acoustic signatures when experiencing pain, fear, pleasure (rooting in substrate), or social play.
SoundTalks (now a Boehringer Ingelheim product) uses microphones distributed through pig rooms to detect the acoustic signature of respiratory disease (coughing, sneezing patterns) with earlier detection than clinical observation. In 2025, extended versions monitor broader behavioral acoustic patterns including aggression, distress calls, and reproductive status.
The welfare implications are significant: early detection of respiratory disease allows treatment before clinical signs become severe. Research shows acoustic monitoring reduces antibiotic use by enabling targeted treatment, reducing group prophylaxis.
Electronic sow feeding (ESF) systems have been used for decades in group-housed sow management, providing individual data on feed intake per sow. In 2025, newer systems also capture movement data from RFID ear tags or electronic necklaces, enabling welfare assessments based on activity levels, feeding patterns, and water intake. Deviations from baseline patterns trigger alerts — a sow not visiting the feeder for 24 hours is likely ill or injured.
Temperature, humidity, air quality (CO2, NH3, H2S), and lighting sensors connected to farm management systems enable automatic environmental optimization. Ammonia exposure causes respiratory irritation, eye disease, and reduces pig welfare significantly; automated ventilation adjusted by ammonia sensors maintains welfare-compatible air quality. Heat stress monitoring during summer months triggers automated cooling (misters, shade, floor cooling) to prevent acute welfare emergencies.
Platforms like Herd-i, Pig-it, and Velos (now Nedap Livestock Management) aggregate electronic health records for individual pigs including treatments, vaccines, weights, and behavioral flags. When combined with sensor data, these platforms enable precision health management — identifying pigs at risk before they require emergency intervention.
In 2025, integration with veterinary practice management software allows remotely consulting vets to review welfare dashboards and advise on farm management without physical farm visits. This telemedicine integration improves welfare-relevant veterinary oversight in regions with limited local veterinary availability.
Sow body condition is a critical welfare indicator — both under-conditioned and over-conditioned sows experience welfare harms. Camera systems using 3D depth sensing can now automatically assess body condition scores (BCS) as sows pass through electronic feeding stations, providing daily individual scores that would require hours of manual assessment weekly.
One of the most contested welfare issues in pig production is the farrowing crate — a confinement device used during birth and lactation that prevents sow movement. While reducing piglet crushing, farrowing crates prevent natural maternal behaviors including nest building. "Smart" farrowing systems under commercial deployment in 2025 use pressure-sensitive floors and camera-based piglet position monitoring to allow sow freedom of movement during most of lactation while providing automated "locking" during highest-risk crushing periods.
The PigSAFE pen (developed at Newcastle University) and commercial equivalents (PigTek PigProtect, Wienhold systems) incorporate these features. European regulatory timelines — Denmark and Germany requiring farrowing crate phase-out by 2035 — are driving rapid technology investment in this area.
EU legislation required group housing of sows from 2013. Managing group housing welfare effectively requires technology: ESF systems with individual recognition prevent competition for feed; RFID-controlled separation stalls allow management of aggressive individuals; automated weight monitoring tracks individual growth in mixed groups. In 2025, third-generation ESF systems incorporate welfare behavior monitoring alongside feeding management.
Welfare at slaughter is another technology frontier. High-concentration CO2 stunning — the dominant method in intensive pig slaughter — causes severe distress during induction (pigs gasp and panic when exposed to high CO2 concentrations). Research and commercial development of alternatives including low-atmospheric pressure stunning (LAPS), nitrogen/argon gas mixtures, and two-phase CO2 induction (with CO2 concentrations raised gradually) are underway. In 2025, Danish Crown and several UK slaughterhouses are piloting gradual-onset CO2 systems that reduce behavioral distress signs during induction while maintaining efficacy. New Zealand approved LAPS for pigs in 2024, the first country to do so commercially.
Technology data raises new questions: who owns on-farm welfare data? Retailers and assurance schemes are increasingly requiring access to welfare monitoring data as a condition of supply. Farmers may face privacy concerns; however, welfare monitoring data shared with welfare assurance bodies provides verifiable evidence of on-farm conditions, potentially replacing burdensome physical audits. In 2025, the UK's Red Tractor scheme and several EU certification bodies are piloting continuous data monitoring as a supplement to annual audit visits.
Tags: Pigs Technology AI Monitoring Precision Farming 2025