Laboratory Animal Identification Methods
Data collection is at the heart of every research project. To a researcher, mice are living data reservoirs essential for producing key insights. Accurately identifying your study animals is vital to ensuring reliable and precise research outcomes.
Charles River Pre-ID™ services enable you to receive animal models that have been identified with the codes you provide us. Our skilled technicians perform all procedures in adherence to the highest standards in aseptic technique and animal welfare, and you have the option to select the identification that is most appropriate for you.*
Benefits of Pre-ID™
- Reduced labor and supply cost associated with in-house identification
- Improved chain of custody and ownership
- Reduction in time needed to place animals on study
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* Not all identification methods are available in Europe. Please contact your local Charles River Customer Service team to determine your options.

Did You Know?
The Labstamp® animal identification method is now available for our immunodeficient, VAF/Elite® and genetically engineered mouse models.
| Method** | Mouse | Rat | Guinea Pig | Gerbil | Hamster |
| Labstamp® | ● | ||||
| RapID Tags® | ● | ● | ● | ● | ● |
| Ear Tag | ● | ● | ● | ● | ● |
| Microchip – subcutaneous implant | ● | ● | ● | ● | ● |
| Microchip – SOMARK chip | ● | ● | |||
| Ear Punch | ● | ● | ● | ● | ● |
| Tattoo | ● | ● | |||
| Tail Marking | ● | ● | |||
| ** Not all options are available for every species/strain. | |||||