Meet the office staff here at Tinseltown Dog Training! 


John Van Olden – President/CEO

Canine Trade Group was created by dog training veteran John Van Olden. His first experience in the industry came when he was just eighteen years old and training to be a military policeman. He was responsible for training and caring for his canine counterpart, and the passion stuck with him even after his service was over. He went on to preside over PAWSitive Solutions and start his own training company, K-9 Advantage. He was also a founding member of the International Association of Canine Professionals.

Now, thirty years after his first taste of dog training, he’s created an easier way for dog owners across the country to find capable, professional, and certified trainers in their area. Canine Trade Group is a network of dog trainers that have been trained and handpicked by John. Each is in charge of his or her own business, and they can all be reached by calling a single phone number.

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Cristin Ellis – Operations Manager

Cristin is Canine Trade Group’s Operation Manager and a talented trainer in her own right. She put two Master Agility Championship titles on her two dogs, Rocky and Hunter, and has helped others find similar success in the show circuit.

After her third dog, a Border Collie named Sike!, she realized training for agility didn’t provide her with the knowledge of canine behavior she’d need to tackle his anxiety and aggression. She participated in the same training program as CTG certified trainers and discovered the cause of her dog’s behavioral issues and exactly how to solve them.

Most importantly, she learned that any canine behavior problem can be fixed, as long as the dog has a dedicated owner and a knowledgeable trainer. She now has two more Border Collies name Elsa and Phin, who is prove the CTG method works flawlessly!

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Nicole Zulkowski – Veterinary Relationship Manager

Nicole knew ever since she was a young girl that she wanted dogs to be part of her life and career. Throughout high school and college, she worked different jobs that involved animals. Graduating with a BS in Biology from Ursinus College, Nicole began to look for work within the animal care field, and was employed as a veterinary technician and also a dog daycare technician/handler. After working with many dogs with a wide range of behaviors, Nicole was inspired to learn more about how these behaviors form, and also how to treat them.

Canine Trade Group is thrilled to have hired Nicole into the office staff. Along with her extensive knowledge on canine behavior and psychology, she also shows great care toward dog owners who are looking for ways to solve their dog’s behavioral issues. Nicole undertook the same trainer course that Canine Trade Group’s trainers did so that she could better address client questions, dog issues, and guide everyone to the right training protocol that would suit their needs and goals.

When she’s not busy helping other people and their dogs, she likes to hang out at home with her two dogs, Willow (a Pitbull mix) and Brooklyn (a Boston Terrier/Pug).

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Dr. Karen Usselman V.M.D. – On Staff Veterinarian Consultant

Dr. Usselman is originally from western New York, attended Cornell University and then the University of Pennsylvania, School of Veterinary Medicine in Philadelphia.  She graduated in 1996 and joined Brenford Animal Hospital in May 1996.  She is currently a partner with the practice. 

Dr. Usselman enjoys working with dogs and cats.  She is particularly interested in internal medicine, ultrasonography, behavior and dentistry.  She serves as the treasurer of the Delaware Veterinary Medical Association and has taught in the Delaware Technical College Vet Tech program.  Dr. Usselman is married to Dr. Jeff Booth and has two children, three dogs and a cat to keep her busy at home.


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