Hello,

In this link, it was mentioned that toe clipping is not allowed by NHGRI. On the other hand, what kind of mark do you think for the wrist ankle?

http://www.theodora.com/rodent_laboratory/identification.html

Best wishes

I was thinking about a ring, that i could close by clenching cautiously around the ankle. Do you think this is forbidden by ethical comittee?

Well, I'm not sure. Maybe you can check this web page. (especially regulations part. On the other hand, these regulations are for USA. For European regulations, you may check the website of FELASA)

https://oacu.oir.nih.gov/animal-research-advisory-committee-guidelines

Hi again,

http://journals.sagepub.com/doi/pdf/10.1177/002367712473290

This article is a report of FELASA for identification methods. I hope it will help you. 

Kind regards

Thanks a lot !