Fiddler was more than a year old before I felt comfortable leaving him out for most of the day. However, I have learned that I need to crate him if his regular routine is broken. For example, he starts to get into things either right before or right after I do trips for business. He either sense that I'm about to leave home or is acting out when I get back, and so I find that I need to keep a close eye on him for a couple days. After that, he's fine. I don't travel that much and either my husband watches him or he spends a few days in the kennel while I'm gone. I'm a professor at the university, and during the summer I work mostly from home. When the school year begins, I start to work more from my office. During the transition, I always need to keep a very careful eye on him. I don't necessarily crate him, but I feel a bit nervous if I have to be gone for 8 hours and he's used to me being home during the majority of the day. I take an extra look around the house to make sure nothing has been left on the floor, on the stairs, on the edge of the counter top, etc. I also close all doors to bathrooms, bedrooms, etc. The BIGGEST problem I've had, however, is getting my husband to be just as careful. I remind him and remind him and remind him to shut doors, pick up papers, put toys away, etc. Sure enough, it seems he always forgets something. One time he left a gym bag out, and Fiddler ate a roll (not much left) of dental floss. He ate the plastic container too! Thank God he left the metal piece that cuts the thread! Sometimes I get very upset with my husband and tell him such forgetfulness can result in a dead dog! I'll resort to putting notes on the door, etc. because sometimes he leaves the house after I do. It gets very frustrating at times. I don’t know if I could forgive myself or my husband if Fiddler ever got seriously injured from human forgetfulness. I’m not perfect either, but sometimes I just don’t know what to do to get my husband to be more careful. :-(