The “3-3-3 rule” is a loose guide for measuring your rescue dog’s progress in the first 3 days, 3 weeks, and 3 months at home with you. It emphasizes patience and routine over immediate progress. In the first three days, you should give your dog space and set boundaries with them. In the first three weeks, you should introduce them to the rest of your family and fur fam. And, after the first three months, you should finally feel like your rescue pup is acclimated to your home.