Can rats eat lentils?

Yes, but only a little: rats can eat lentils. The PDSA lists lentils and chickpeas among occasional treats. The RSPCA’s NextGen site counts chickpeas as protein-packed treats, and Woodgreen includes lentils in the protein part of its homemade food mix, which is stored in an airtight container and used within three months. None of the sources says explicitly whether they should be cooked or raw.

How to serve it: as a small treat