Written by Tom Stein and Robert Drew

The MAXIMUS Free Access ESF System is fully integrated with the MAXIMUS Controller on your farm. MAXIMUS uses all of its technology associated with controlling your ventilation, feed, lighting and alarm systems to now also feed and monitor your gestating sows in the best most animal friendly pen setting. Instead of just housing sows together and individually feeding each sow, we work with producers to develop and design the best environment for the sows. Our experience has proven that when sows are penned together in an environment that reduces stress, aggression, and competition, the need to separate sows by parity, provide extensive pre-training and continually sort and remix sows is both unnecessary and detrimental for animal welfare.

Quick & easy access to data

The most important factor affecting reproductive performance of sows in a group setting is the ability to accurately feed individual sows in an environment that is safe and comfortable for the sows.

Data is accessible, like everything controlled by the MAXIMUS, via the web 24/7.

MAXIMUS monitors and accurately doses feed intake per sow, and has a sensor to ensure feed has been delivered.

The RFID enabled antenna allows the sow to be fed when she wants, and tracks her habits and intake iPad technology allows for easy, employee-friendly adjustment and monitoring at the sow/pen level.


Perfectly ties together with your MAXIMUS Controller and whole management system. Communicates with the rest of your feeding system, bin scales, chain disk… Has the ability to notify you with an alarm immediately if any part of the system needs attention.


MAXIMUS Free Access System – ESF system provides the most durable and safe environment for sows in a group housing setting. Adapts to any retrofit or new construction. Reduces the need for pre-training. Specifically designed to reduce competition for feed using the sows’ normal, natural behaviors.


Precise and customizable system. ​Operates and feeds sows without relying on Bluetooth, wireless, or router technology. Uses the same low voltage communication and DC power to operate as the MAXIMUS controller.

Based on experience in loose housing and measuring animal behaviors and welfare, MAXIMUS has developed sound and repeatable criteria for its Free Access ESF System

  • 20 square feet per sow
  • 15 sows per feed station
  • 15 sows per water station
  • Static system – post preg check
  • 2 sets of double feed stations per pens
  • Post preg check (pre implantation design available)
  • Clearly designated/separated Eating area, watering area, sleeping area, and dunging areas with each pen
  • Solid fencing (partially solid) and divider panels to maximize sow comfort and safety
  • Total slatted flooring
  • Lights above feed stations on 24/7