I used to have 4 rats. 3 I got as siblings when they were 9 weeks old, they were all blue dumbo rats, Hachiko, Luna, and willow. A few months later I found an orphaned 2 week old roof rat called Benji, and I raised her with kitten milk. She still lives with me and is now about 9 months old. Willow unfortunately passed about 2 weeks ago. Rats are wonderful