Livestock Feeding Studies

To meet regulatory requirements for agrochemicals, residue depletion studies must be performed to establish minimum residue levels (MRL) and an appropriate withdrawal period. We have considerable experience performing metabolism and livestock feeding studies in compliance with current US and EU regulations. Our facilities are ideally suited to this kind of work and animals can be housed in either our agricultural-style units or on our research farm.

Our formulation chemistry group is available to prepare diets, suspensions or capsules and to confirm homogeneity, specific activity and test item concentrations using modern analytical technologies.

  • Daily or twice-daily dosing for up to 28 days
  • Capsule or admixed to feed (concentrates)
  • Dose preparation in-house as required
  • Twice-daily milking
  • Daily food consumption
  • Concurrent residue analysis of milk samples
  • Environmentally controlled study rooms
  • Individual stainless steel cages
  • Individual food consumption and laying records
  • Dose preparation in-house as required
  • Daily or twice-daily dosing for at least 28 days
  • Capsule or admixed to feed (concentrates)
  • Concurrent residue analysis of egg samples

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Residue Analysis

Using samples from studies conducted at Charles River, or provided by you, we can develop assays or evaluate and modify a supplied method using a full suite of analytical techniques and instrumentation.

Ecotoxicology Studies

Ecotoxicology Studies

Our custom-designed ecotoxicology facility is equipped to run aquatic and terrestrial ecotoxicology investigations.


Webinar Replay

This webinar replay discusses the studies that may be required and the factors that must be considered when designing your residue chemistry program. Regulatory residue chemistry studies are required for acceptable submission of an agrochemical product.