The Trainer everyone’s been talking about

Looking for expert dog training in North Jersey or Long Island? At Gold Coast K-9, we specialize in personalized, results-driven training programs designed to build better communication between you and your dog. Now serving Mahwah and surrounding areas, we bring years of professional experience and proven methods tailored to your dog’s unique needs. Whether you’re struggling with obedience, leash manners, or reactivity, we’re here to help you create lasting behavior change. Let’s build a confident, well-mannered dog—together.

A tan dog with a collar, lying on grass in a park with blurred trees in the background, tongue out, looking alert and happy.
Close-up of a black and tan dog, possibly a Doberman or Rottweiler mix, with its tongue out, outdoors in a wooded area with blurred trees in the background.
A small brindle French Bulldog looking up at the camera outdoors on grass.
A Rottweiler dog sitting on grass in a park with trees in the background during daytime.
Close-up of a cute, fluffy dog with black, white, and gray fur lying on a green surface outdoors, surrounded by blurred green trees and grass.
A black dog wearing a red bandana with a logo that says 'K9' and 'GOLDCOAST' printed on it, standing outdoors with a blurred background of trees and sunlight.

What our friends are saying

  • Illustration of customer dog, Roxy the beagle

    Zala The Belgian Malinois

    “If you are in search of a dog trainer, hire Nick Messina of Gold Coast K-9. He is brilliant and thorough. I truly cannot recommend him enough.

    My husband I sent our 5 month Belgian Malinois to Nick's board and train program and it was one of the best decisions we've ever made. We also continue to work with Nick to keep up and stay on top of it. It has been so much fun for all of us. And we have a beautifully well behaved dog to show for it.”

  • Leon the Pug!

    Leon the Pug

    “Gold Coast K9 and head trainer Nick is the Real Deal! We sent our dog Leon to him for training because our house was complete chaos. Nick was calm, knowledgeable and professional. He took our dog for several weeks and when he came back we had a well behaved pet!! Nick is the BEST!! Choosing him to train our dog was the BEST DECISION WE EVER MADE!! He has only been home a couple of days and our lives are calmer. There is no more destruction of furniture and our dog is very happy. We could tell throughout the process that Nick was making headway. He would send us videos to keep us informed almost daily. I recommend Gold Coast K9 to any dog owner!! He is first rate!! I had interviewed many trainers before making the decision to move forward with Nick. I know without a doubt that I made the best decision by hiring Nick to train our dog Leon!!! He has a special connection with the animals and his expertise is second to none!! Thank you Nick and Gold Coast. You are a true professional we are so grateful for your help!! You have changed our lives!!! I highly recommend using Nick to train your dog!! You won’t regret it!!! I can’t say it enough the BEST!!”

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Your pup could be featured!

Close-up of a happy golden retriever dog with its tongue out, standing outdoors on a sidewalk with greenery in the background.
A tan and gray dog with floppy ears and sad eyes sitting outdoors on a wooden surface in front of a house with white siding and blooming trees.
Black and white photo of a happy dog with a flat tongue, standing in a wheelbarrow with a background of blurred trees and ground.
A cheerful dog sitting on a log in a park with leafless trees in the background, licking its nose.