I have a pair of sullys that are now 14 months old, I live in Phoenix, Arizona and was wondering at what age could they handle living outside all the time? They spent most of the summer outside but now that night time temps are coming down I have been bring them in at night. We get very few night here that drop below 40 to 45 degrees at night during the winter months, and currently the night temps have been around 55 to 60.