This one surprises a lot of new adopters — but it's one of the most practical and effective tools in those first few days. For at least the first week, your new dog should have a leash attached to them any time they're inside your home.
Not because they're bad. Not because they can't be trusted eventually. But because right now, they don't yet know the rules, the layout, or the boundaries — and a leash gives you a calm, safe way to guide them without ever having to grab, chase, or correct.
Critical note: For at least the first week, your new dog should always have a leash attached while in your home.
Why it matters
Prevents mischief before it starts. A dog on a leash can't sneak off to chew the couch, raid the trash, or disappear into a room they shouldn't be in. Removing the opportunity removes the need for correction at a time when your dog is still too overwhelmed to learn from it anyway.
Makes potty training easier. When your dog is tethered near you, you'll catch the early signs — sniffing, circling, restlessness — and can get them outside quickly before an accident happens.
Teaches household boundaries naturally. Rather than scolding them for going somewhere off-limits, you can simply redirect with the leash. They learn where they're welcome without any conflict.
Allows safe, immediate intervention. If your new dog and your resident dog have a tense moment or a squabble begins to escalate, a leash lets you calmly step in and separate them without reaching into the situation — which protects everyone, including you.
Keeps interactions safe for your resident dog. If your new dog becomes too pushy, excitable, or overwhelming, you can redirect them before your resident dog feels the need to correct them themselves. That moment of correction is often where conflicts start.
Safer than grabbing the collar. Reaching for a stressed or overstimulated dog's collar can trigger a reflexive mouth response — not aggression, just instinct. A leash gives you a safe distance to guide without triggering that reaction.
How to do it
Let the leash drag loosely while you're supervising — you don't need to hold it constantly. The goal is simply having something to pick up quickly when you need it. As your dog settles in and you get a better read on their behavior, you can gradually give them more freedom. When in doubt, err on the side of caution and keep the leash on a little longer.
It's a small adjustment that makes a big difference — for your dog, your resident pets, and your peace of mind.