We started letting Maci outside right away after she had her shots because we wanted her to be trained to go outside instead of using the pee pad method. She was perfectly fine, and has been doing excellent even with the horrible Minnesota Winter! She knows when she's getting cold, and then she wants in!
We're very proud of our little girl because she picked up the training very fast (2 weeks) and we haven't had any accidents in the house since, which has been 7 months now!