About Me

Alex Nieto, Denver Dog Guru and expert dog trainer, with one of his doggie students. Lots of love goes into training every dog.

Hi, I’m Alex Nieto—dog trainer, behavior nerd, and your dog’s new best friend.

At Denver Dog Guru, my mission is to help dogs live their best, happiest lives by improving the way they connect with their humans. My approach is all about relationship-first training: clear communication, calm leadership, and building trust on both ends of the leash.

Training your dog isn’t just about getting them to sit or stay—it’s about creating a bond that’s rooted in mutual understanding. I’ll teach you how to become the calm, confident leader your dog is craving, and how to read the subtle ways they’re already trying to talk to you.

My method is grounded in connection, fulfillment, and clear communication. I help owners become confident, consistent guides so their dogs can thrive with clarity and security.

Growing up, I was the kid who loved two things: animals and basketball. After playing college ball and still not knowing exactly what I wanted to do “when I grew up,” I realized my favorite conversations always came back to dogs. That passion turned into Denver Dog Guru.

I live in Centennial, CO with my amazing wife Amber (the real boss who keeps everything running), and our two wild toddlers. We spend most of our free time out on family adventures—crashing story time, exploring new parks, and figuring out the next snack.

Honestly, parenting and dog training? Pretty much the same thing. Clear communication, structure, patience… and the occasional mess on the floor.

Alex Nieto, Denver's favorite dog trainer and his family
Top Denver dog trainer, Alex Nieto, and his family playing by the river
A black and white photo of Labrador Retriever puppy looking to the side, with some out-of-focus food bowls in the foreground.

I love helping dogs and their people.

Puppy Training & Foundational Skills

Start your pup off right with guidance on crate training, potty training, engagement exercises, safe socialization, and creating a consistent household routine. I’ll help you build a strong foundation from day one, before bad habits have a chance to stick.

Behavior Challenges- Reactivity, Fear & Anxiety

Alex working with a dog with behavioral challenges

Whether your dog bites, lunges at bikers, or shuts down in new environments, I’ll help uncover the “why” behind the behavior and guide you through practical steps to create calm, confident responses instead.

On leash and off leash dog training in Denver, Colorado from Alex Nieto

From casual neighborhood strolls to reliable recalls at the park, I’ll help you create structure and freedom—so your dog listens no matter where you go (and you can stop holding your breath on every walk).

On and Off-Leash Reliability

Close-up black-and-white photo of a bulldog with a worried expression, standing on a brick street, with a person walking in the background.

Building Confidence—for Dogs and Humans

Training is about more than just the dog. I work with you to become a calm, consistent leader your dog can trust. Together, we build the confidence and communication skills that create lasting change — on both ends of the leash.