"Feeder" - what is it, definition of the term
The term «Feeder» designates a feeding apparatus for laboratory rodents such as rats and mice; it consists of a sealed food reservoir linked to a controlled dispensing opening that delivers measured portions while minimizing spillage, contamination, and gnaw‑induced damage, often employing gravity‑fed troughs, timed release valves, or adjustable apertures made from chew‑resistant, corrosion‑proof materials to ensure consistent nutrient intake and support precise experimental conditions.
Detailed information
The feeding apparatus designed for small rodents such as rats and mice delivers precise portions of nutrition while minimizing waste. Construction typically involves durable polymer or metal components resistant to gnawing, with a sealed hopper that protects dry feed from moisture and contamination. A calibrated dispensing mechanism, often spring‑loaded or gravity‑driven, releases a measured amount of food at set intervals, supporting consistent dietary intake.
Key functional attributes include:
- Adjustable release frequency, allowing researchers or caretakers to synchronize feeding with experimental protocols or circadian rhythms.
- Volume control, enabling specification of gram or milligram quantities to match the metabolic requirements of different species or life stages.
- Easy‑to‑clean design, featuring detachable parts that can be sterilized without disassembly of the entire unit.
- Secure mounting options, such as cage‑compatible brackets or floor‑standing bases, to prevent displacement by active rodents.
Performance considerations focus on feed integrity and animal welfare. The hopper’s airtight seal prevents spillage, reducing the risk of ingestion of foreign materials. The dispensing system must operate silently to avoid stress responses, while the material composition should be non‑toxic and free of sharp edges that could cause injury.
Maintenance protocols recommend weekly inspection of the dispensing valve for wear, periodic replacement of worn seals, and routine verification of calibration against a reference scale. Documentation of feeding schedules and portion sizes supports reproducibility in laboratory settings and ensures compliance with ethical standards for animal care.