Whether a new puppy is destroying your home or a longtime companion has become too aggressive for a walk around the neighborhood, you may be feeling overwhelmed by your dog.

It doesn’t have to be this way – for you or your dog. We can help.

A Better Relationship With Your Dog is Possible —one that isn’t a struggle and won’t wear you out

If you’ve thought about medicating, rehoming, or even euthanizing your dog, we have good news: those aren’t your only options. Training – even if other programs haven’t worked in the past – is possible. While time and commitment are both necessary, the right approach is critical. It’s that approach – one that understands and works with the ways dogs learn best – that’s earned us the respect of professionals, families, and, of course, happy pups all across Colorado.

Meet our Team
Our Testimonials

"Absolutely the best trainer I have ever worked with. I had a 14 month old German Shepherd, Rottweiler, Pitbull mix who was off the wall crazy. He was a wrecking ball who didn't realize how big he was. After 6 sessions I have a completely different dog. He does not pull on the leash at all. In fact, he stays right next to me in line with my hip whenever we walk. Not only does he respond to all my commands like "sit" and "down" but he won't break his down or sit position until I tell him to. Trust me, if you need a dog trained badly (like I did) go to Ancillary K9. "

Michael Richardson – Aurora, CO

"We are in the middle of a 6 lesson package, and Dion has been great with our dogs! We have 2 aussies and one was unfortunately attacking the other. We were at the point of considering having to get rid of one of our dogs but found Dion and saw that he specializes in aggression. He has taught us how to take control of our dogs and provide structure so that they listen to us and look to us for guidance rather than just doing whatever they want all the time. We saw a huge difference in our dogs after just the first week! He has not only taught our dogs, but has taught us the correct way to train and Work with them and how to react if they do start to show signs of aggression. We still have a ways to go with the aggression but we are really hopeful that with Dions help we can keep both of our dogs! Dion is very patient and takes a lot of time answering questions and explaining things in a way that helps you understand how the dogs are thinking. I wish we would have started working with him a long time ago, and would highly recommend him to anyone! "

Michelle Toubeau – Denver, CO

"We have been very happy so far with Ancillary K9 and Dion. They make the process really easy and they are very organized. It started with a 20 minute consultation with Dion where we talked about our wants, needs, and expectations, and Dion gave us feedback on what was realistic and what was necessary. We meet at the same park which is beneficial for our dog's learning process. The online scheduling system is easy to navigate and Dion is very understanding when we need to cancel an appointment. He is relatable, he is knowledgeable, patient, and he makes the experience fun. We have learned a lot so far and can't wait for our last session with him and maybe even more! "

Kristine Nguyen – Aurora, CO

"After completing two separate six week training sessions, at one of the big box pet centers, my dog was just not "getting it". I decided to give Dion a try and after one lesson my dog made more progress than all the other lessons combined. I couldn't be happier with the progress he made and signed up for several more sessions. The training was as much for me as for my dog, I learned how to teach him what I wanted from him and he was eager to please me. Dion was very professional and interested in helping me achieve the results I expected from my dog. I would not hesitate to recommend anyone to take their dog to Ancillary K9 and give them a try. Be prepared for results! "

Philip Rieg – Aurora, CO

"I was very impressed with his knowledge. I have taken my dog as far as I can go with my experience and started looking for someone to help me go further with him. This trainer is very experienced and takes time to answer questions. He really seems to care that he teaches the owner in the correct manner so I can get the best out of my dog. I am looking forward to working with this trainer especially after watching him work with his own dog during our first visit. I was highly impressed and can't wait to get my pup to that level. "

Kelly Ray Burkham – Denver, CO

"Since our initial meeting with Dion, our experience has been wonderful. He reassured us that the issues we were having with our dog were things we'd be able to improve in just a little bit of time & only get better from there. From the very first session, you could see the difference in our dog. Dion made sure we had all the tools for success, even recommending his personal favorite products. Throughout each session we've had with Dion, he's made sure we're fully aware of exactly what he is doing and why he is doing it. He's been very communicative through each session, making sure we're comfortable or understanding of all we're working on. It's wonderful having a trainer that truly cares how your dog is progressing, how you're feeling as owners, and being able to explain exactly WHY we're doing it the way we're doing it. Can't recommend him enough. "

Alicia Luther – Denver, CO

"Dion is an outstanding trainer. He took time to listen to my issues, understand my goals, and work with me to create a specific approach towards training my dog. He’s open to many training methodologies and locked in on a strategy that works really well for me and my Belgian Malinois. He’s also friendly, personable, and really enjoyable to hang out with during sessions. My dog and I look forward to our training every week. Would recommend to anyone "

Dan Warner – Boulder, CO

"My sister and I were so lucky to find Dion! We share an apartment with her dog who has some intense behavioral issues. Dion taught us how to look at training from a very black and white perspective, which proved to be very effective. He also set us up with the proper tools for training, which we used during sessions, giving us hands-on experience with them. Having someone who was so personable and clearly cared about our pup's well-being made sessions easy and fun. I was able to use them on my own dog as well, and months later, continue to share his tips with others! "

Lauren Ferrier – Denver, CO

"We LOVE Ancillary K9, we have only done 2 sessions with Dion and I already see a huge difference in my girl. We saw other trainers that were good but Dion just speaks my dogs language. She was attacked and is really scared of dogs that are off leash. We will definitely be continuing with him for more advanced training in the future and will update my review then. He is also really patient and trust me I know because I usually have a million questions. My dog is a Belgian Malinois/German Shepherd mix so it took us almost a year to find the right trainer for her breed and personality, Thanks Dion! "

Irene Villalta – Lakewood, CO

"I reached out to Dion as I am looking to train dogs myself and was curious about the industry. I called Dion on a Monday afternoon leaving a voicemail requesting to shadow him as he worked with clients. Dion called back within the hour (he was the only trainer to call back). He was enthusiastic and helpful. He recommended books and other resources. That same week on Friday Dion arranged for me to shadow him with two clients and their two pups. He throughly explained his philosophy and practice. I watch him work and was very impressed. He is a natural with the dogs and is skilled at communicating to his human clients how to work most effectively with their dogs. The dogs seems so advanced and quick to follow his commands I was shocked it was only their second session. After the hour I spent watching him work he took another hour of his time to explain what his was doing with the dogs and some basics about the industry. He also answered all my questions and provided further resources. I really appreciated Dion’s time and enthusiasm. Dog trainers must apprentice to learn their trade and Dion’s willingness to work with newcomers and share his experience with such passion and detail is a rare and special find. "

Jonna Cammack – Denver, CO

"My high-drive Dutch Shepherd came to us with plenty of behavioral baggage. Dion has an ambitious approach to observing and humanely correcting these behaviors without pushing the dog or the handler too far, too fast. He understands the dog's capabilities and instincts and is very fluid with the training program, so if I show up to training lacking any supplies or preparations necessary to a particular training aspect, Dion will be prepared with a backup plan to train another area of interest. He is also plugged into a local community of highly professional trainers and k-9 enthusiasts and was willing to introduce us to some of these fine people. Dion has much to offer dogs of all kinds and dog handlers who are willing to put in the work necessary to setting and achieving their mutual goals; his rates are also incredibly reasonable and the Ancillary K9 scheduling interface is super easy and flexible. I would certainly recommend Ancillary K9 to other dog handlers of all levels. "

Robert Lauber – Denver, CO

"I have an Akita puppy that completed 2 levels of group training classes at one of the big pet stores. She would listen for treats but was becoming aggressive towards my other dogs. Other trainers and breeders told me I'd have to get rid of her for my other dogs' safety. I was desperate for help when I contacted Ancillary K9. I signed up for the obedience package with the hope of being able to turn things around and keep my 6 month old puppy. After the first training session, I could see a huge difference in her attitude. She looked up to me as a leader and actually started listening without me having to bribe her with treats. We just completed our training yesterday and she is a totally different dog! The aggression is a thing of the past. She's 9 months old now, and she's my best behaved dog. Dion is amazing at what he does. He does a phenomenal job working together with the dog and owner. If you want to learn how to train your dog and gain their respect, Ancillary K9 is the answer! "

Samantha Rider – Brighton, CO

"Two years ago I rescued Gilbert, a truly remarkable but quirky and energetic dog. My best friend thinks he was struck by lightning as a puppy, only partly in jest. I think I did a great job raising him, but Dion has been a revelation. He's given me such an amazing set of tools to help Gilbert and me and our roommates all live together more happily. In part this was Dion correcting mistakes I didn't realize I was making, like using a harness despite Gilbert pulling all the time, but more than that Dion helped me understand how Gilbert thinks. I remember thinking, confused, how can it be that a stranger understands my dog better than me? It's a testament to Dion that he does. He also understands me as a dog owner, and has been empathetic and accommodating of who I am and what I want from owning a dog. I cannot recommend Dion enough. If all you want it to correct minor inconvenient behavior, he's your trainer. If you want to get your dog off leash on trails, he's your trainer. And, though I don't want to take Gilbert to dog shows or through agility exercises, I believe if you do Dion is also your trainer. For your sake and your dog's sake, spend an hour with him. You'll look back and wonder why you spent so long not properly training your dog. "

Ryan Langendorf – Boulder, CO

"Dion is an outstanding trainer. He took time to listen to my issues, understand my goals, and work with me to create a specific approach towards training my dog."

Dan W. – Boulder, CO

"I have already seen so much improvement with my dog within the four classes that we have had so far... I never imagined I would be able to take my dog into public, let alone have him at ease when doing so."

Dylan B. – Denver, CO
Get Your Free Consultation

If you’re ready to have the relationship with your dog you’ve always dreamed of, we’re here to make it a reality. Not only will you be happier and more content, but your dog will finally have the structure they need to thrive.

Fill out this form with your contact information and let us know you’re requesting a FREE consultation. Over the phone or in-person, you and your trainer will discuss your dog’s behavior, your expectations for training, and determine which program is right for you and your dog. Get started now!

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