None…. Charlie is my first canine, not counting the dog my family had when I was a kid. Scarlett was a bloodhound-lab mix, and we got her when she was three. She was the kindest, mellowest dog, and I was just a kid so the actual “responsibility of a dog” went over my head. So, I went into the raising of Charlie completely blind and ignorant. I’ve read a lot, been in touch with many people with great knowledge, and relied on my intuition, trial and error, and, most importantly, paid close attention to what Charlie tells me along the way.