Youngsters (8 weeks+)
These are rats at the youngest age for adoption to about 4 months (ECMR breeding age)
Adults (6 months+)
Adult rats that I don't need for breeding or have changed breeding goals. Some retired breeders
Seniors (1.5 years+)
All adoptable rats are at least 8 weeks or older, ECMR does not adopt out rats younger than this.