My wife and I are hoping to get our Pyr "Bear" into backpacking with us. We went to see some packs today but were disapointed by the level of knowledge that the stores had on the subject. Q: How much can a Great Pyrnees carry? What is the best way to start Bear out, he's 3 years old. If anybody can help, I am looking forward to hearing from you. Jessie, James & Bear