He is my brother's dog and was in his element while we on holiday as he likes nothing better than having his flock around him! Carter is gentle indoors and will come and see you to have his neck and head stroked. However, his instinct to protect is well ingrained and if he doesn't like the feel of someone he will make his unease known (including pissing all over an American's shopping when he didn't like the look of them and growling at someone who shouted at us).
He was a challenge to train by all accounts as he has a slightly unpredictable streak and when he gets an idea about something (such as chasing a dog or hunting a rabbit) he will take off with no warning! Last time we were away (and he was younger) he headed off downhill after a small dog with my sister lying on her back on the ice, gripping his lead for dear life and being pulled down the hill! Pain does not deter him. Another year, in the summer, he poked his nose in a rock and got bitten by a viper! His nose swelled to twice the size and he was pretty unwell for a few days but that has not stopped him trying to do it again!