Reviews for Ancillary K9 Dog Training

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  • January 2026

    Thanks to Dion my dog can now live a happy life and I can enjoy alongside him. Whether I need to go grab food or hike a trail, I can now trust my dog to listen and behave. Dion has an almost magical ability to read my dog’s needs and he offers exactly the right solution to have it corrected. I cannot thank him enough for all the joy that I now get to experience with my dog.

  • November 2025

    What can I say about Dion other than he’s fantastic and helped me and my pup tremendously! I rescued Rue about a year ago. She was super skittish, terrible on a leash, scared of any loud noises, men, bikes, thunder, the list goes on. And had an extremely high prey drive. My main goal was to reduce her overall anxiety and selfishly wanted to improve her recall so she could be off leash when we explore. Dion has helped with all that and more. I can confidently leave her off leash even with a squirrel nearby. she walks nicely by my side when we’re out. She seems way less anxious and just overall a more happy pup. Dion also taught me the skills to be a more confident... read full review

  • October 2025

    After much internet sleuthing for a dog trainer who would provide lasting results, I kept circling back to Dion’s website. Multiple peers recommended board-and-train programs, but I ultimately preferred to be involved in my dog’s training. This strengthened our relationship and has made maintaining what we both learned during our sessions straightforward. Although Dion specializes in reactive and “problematic” dogs, his training methods are equally applicable to dogs who struggle with the basics. My dog, Reicher, fell into the latter category. When we first started, he had absolutely no leash manners or recall. I dreaded walks with him, because he would incessantly... read full review

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    Ancillary K9 Dog Training

    720 S Colorado Blvd Ph N Ste 1357, Denver

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