my 4.5 month golden stays in her crate while my gf and i are at work or school. we put her in around 8am, come home to walk her at lunch, then put her in again until 5pm. she's still in the chewing phase so we always have to keep an eye on her. unfortunately, she just had surgery to remove a benign tumor on her head so she has to be watched 24-7 for the next two weeks to make sure she doesn't rip out the stitches.