Best way to introduce a new puppy to an older dog

There's no single "best way" because older dogs have wildly different temperaments - some are cool with puppies right away, others need way more time. But there are definitely some solid approaches that work for most situations.

Start by letting them meet on neutral ground, like a park or a friend's yard, somewhere neither dog has claimed as territory. Keep both on loose leashes so they can sniff and interact naturally without feeling trapped. Don't force anything - if the older dog is clearly stressed or the pup is being too rowdy, separate them and try again later. The first meeting should be short, maybe 10-15 minutes, just to get the initial weirdness out of the way.

Once you bring the puppy home, manage their time together carefully. Give your older dog their own space where the puppy can't bother them - a separate room, a crate, whatever works. Feed them separately too, because resource guarding can show up fast and ruin the whole dynamic. Let them have supervised playtime together during the day, but keep nighttime and meal times apart for at least the first few weeks. The older dog needs to feel like they're still the priority, so don't make all your attention go to the cute new addition. Most older dogs warm up once they realize the pup isn't a threat and life still makes sense for them.

Multiple short supervised meetings before they actually live together tend to work better than people expect - my older dog completely ignored a new puppy until the third or fourth time they met, then suddenly decided it was fine. The key is keeping those early encounters brief and positive so the older one doesn't get overwhelmed or territorial.