Hi! I raised them from around 1-2 weeks old. I have 13 full grown grey squirrels, 6 grey babies and 2 adult flying squirrels. Right now 2 full grown and all 6 babies live in the house with me. A couple of them are not really 'tame' - they will nip my hand. But the rest all sit in my hands or on my shoulder or run up and down my body! ;o)