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Related Experiment Video

Updated: Mar 22, 2026

Feeding Experimentation Device FED: Construction and Validation of an Open-source Device for Measuring Food Intake in Rodents
09:18

Feeding Experimentation Device FED: Construction and Validation of an Open-source Device for Measuring Food Intake in Rodents

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Feeding Experimentation Device (FED): A flexible open-source device for measuring feeding behavior.

Katrina P Nguyen1, Timothy J O'Neal1, Olurotimi A Bolonduro1

  • 1Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Building 10-CRC, Room 5-5932, Bethesda, MD 20892, USA.

Journal of Neuroscience Methods
|April 10, 2016
PubMed
Summary

The Feeding Experimentation Device (FED) offers a low-cost, open-source solution for precise rodent food intake monitoring in home cages. This system provides high-resolution data on feeding patterns, overcoming limitations of manual methods and expensive commercial systems.

Keywords:
ArduinoFeeding behaviorFood intakeOpen-source

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Area of Science:

  • Neuroscience
  • Animal Behavior
  • Biomedical Engineering

Background:

  • Rodent food intake measurement is traditionally labor-intensive and imprecise.
  • Existing commercial feeding monitors are effective but prohibitively expensive and require specialized equipment.
  • There is a need for a cost-effective and accessible system for accurate rodent feeding behavior analysis.

Purpose of the Study:

  • To develop and validate a low-cost, open-source feeding system for precise rodent food intake monitoring.
  • To enable high-resolution analysis of feeding behavior in a home cage environment.
  • To demonstrate the system's adaptability for use with other neuroscience techniques.

Main Methods:

  • The Feeding Experimentation Device (FED) was developed using an Arduino microcontroller and open-source hardware/software.
  • FED dispenses single food pellets, logging retrieval timestamps via an infrared beam and an SD card.
  • The system is self-contained, battery-powered, and designed for standard colony cages.

Main Results:

  • FED accurately measures food intake and identifies feeding trends across light and dark cycles.
  • The system provides high-resolution data on feeding behavior patterns.
  • FED successfully monitored feeding increases induced by optogenetic stimulation of specific hypothalamic neurons.

Conclusions:

  • The Feeding Experimentation Device (FED) provides accurate and precise monitoring of rodent feeding behavior.
  • FED is a cost-effective alternative (>10x cheaper) to commercial systems, making advanced feeding analysis more accessible.
  • The open-source, adaptable nature of FED allows for integration with other research techniques, including optogenetics.