One Small Change That Can Prevent Leash Reactivity Later

by Courtney Goblirsch

One of the most common things I see with young puppies, especially once they are fully vaccinated and starting neighborhood walks, is the excitement around meeting every dog they pass. And I completely understand why. It feels friendly. It feels social. It feels like we are helping them learn how to be good with other dogs.

But this is often where leash reactivity quietly begins.

When puppies are young, they are forming expectations very quickly. If every dog they see results in a greeting, they start to believe that seeing a dog means they get to go say hello. That expectation becomes powerful. The moment they spot another dog, their body leans forward, their excitement rises, and they prepare to move toward them.

The challenge is that on leash, they cannot move naturally.

In an open space, dogs approach in curved paths. They adjust their pace. They disengage if they need to. On leash, everything is restricted. As your puppy pulls forward, the leash tightens. They feel physical restraint at the exact moment they are most excited. That combination of excitement and frustration is what often lays the foundation for lunging, barking, and reactive behavior later on.

Most leash reactivity does not begin because a dog is aggressive. It begins because they are frustrated.

Instead of encouraging on-leash greetings, I prefer to teach young puppies something much more valuable: neutrality. When we see another dog on a walk, I create distance if needed and simply keep moving. I allow my puppy to notice the other dog, but I reward calm observation. I reward staying connected to me. I reward walking past politely. The message becomes clear. Other dogs are part of the environment, not an automatic interaction.

This small shift makes a big difference long term.

As puppies grow into adolescence, their excitement tends to intensify before it settles. If they have spent months expecting to greet every dog, pulling can turn into full-body lunging. But if they have practiced calmly observing and moving on, that skill carries forward with them.

Socialization does not mean greeting every dog you see. Healthy socialization is often about exposure without interaction. It is about helping your puppy feel safe, neutral, and regulated in the presence of other dogs, not dependent on them.

Teaching neutrality early is one of the greatest gifts you can give your puppy. It protects their ability to walk calmly through the world with you.