This actually happened to me a couple of times. But it my case it was one puppy (the housetrained one) liberating the other... see my post:
http://labradoodle-dogs.net/forums/viewtopic.php?t=779
I have since set up a web cam (great product, see: http://www.trendnet.com/products/TV-IP400.htm - it's managed over the internet and can tilt and turn. I basically can point it all around the room where they're confined to) to monitor the two dogs from work.... I have since withnessed them shred our couch to pieces from work (very frustrating!!! couldnt do anything about it but watch!) but also witnessed one more break out. The free dog actually figured out how to slide open the two sliding locks of the other dog's crate!
I'm watching my web cam right now and Pacha and Maggie are on the balcony barking at a neighborhood dog that's passing our building
http://labradoodle-dogs.net/forums/viewtopic.php?t=779
I have since set up a web cam (great product, see: http://www.trendnet.com/products/TV-IP400.htm - it's managed over the internet and can tilt and turn. I basically can point it all around the room where they're confined to) to monitor the two dogs from work.... I have since withnessed them shred our couch to pieces from work (very frustrating!!! couldnt do anything about it but watch!) but also witnessed one more break out. The free dog actually figured out how to slide open the two sliding locks of the other dog's crate!
I'm watching my web cam right now and Pacha and Maggie are on the balcony barking at a neighborhood dog that's passing our building