Shelter staff swear by the 3-3-3 rule. In the first three days, your new pet is overwhelmed — expect hiding, skipped meals and accidents. This is normal. Keep things small: one room, one routine, low visitors.
By three weeks, personality emerges. The shy cat starts exploring; the “calm” dog reveals opinions about squirrels. This is when training should begin in earnest, with short positive sessions and clear house rules.
At three months, you are home. Trust is built, routines are set, and the pet you met at the shelter has become someone entirely — and wonderfully — themselves.