One Happy Dog
Service area: Serves the Chicago North Shore area including Arlington Heights, Evanston, Lake Forest, Mundelein, Glencoe, Highland Park, Northbrook, Wilmette, and surrounding communities.
Service Overview
Types of Dog Training
- Family Dog
- Competition / Agility
- Behavior Modification
Specialty Focus Areas
- Puppy Training
- Leash Pulling
- Reactivity / Aggression
- Jumping on People
- Barking Excessively
- Separation Anxiety
- Biting / Nipping
- Potty Training
- Fearfulness
- Recall
Training Formats Offered
- Private Lessons
- Group Classes
- In-Home
- Private Facility
- Video Calls
Program Formats
- One-Time Consultation
- Sessions Package
- Ongoing Weekly
- Intensive Program
Types of Dogs
- Small
- Medium
- Large
- Giant
- Herding
- Sporting
- Working
- Hounds
- Terriers
- Doodles
- Brachycephalic
Age of Dogs Trained
- Puppy (<1 year)
- Adolescent (1-2 years)
- Adult (2-8 years)
- Senior (8+ years)
Dog Training Methodology
Methods:
- ✓ Positive Reinforcement Only
Equipment:
- ✓ Clickers
- ✓ Food Rewards
- ✓ Harnesses
- ✓ Flat Collars
- ✓ Obstacle Courses
One Happy Dog offers private one-on-one sessions, small group classes, and online courses focused on obedience, nosework, and behavior modification. Training is individualized based on the dog’s breed, temperament, and goals. Clients can choose between in-person training at the Mundelein facility, in-home visits, or virtual video reviews. Programs are structured as ongoing weekly sessions with optional intensive packages for focused progress. Online classes include an interactive Navigator tool for self-paced learning.
Pricing & Policies
Pricing Summary
Private training is $150 per hour; packages of 6 sessions are $750 (saving $150). In-home training is $300 per hour; 6-session packages are $1500 (saving $300). Video reviews are $150 per hour, discounted to $100 for current students and members. All packages must be used within one year of purchase with no refunds.
Policies
All training packages must be used within one year of purchase. No refunds are offered. Sessions are scheduled by appointment, and cancellations must be made in advance to avoid forfeiting the session.
Testimonials
“We owe our Nosework career to Margaret. Edge loves his online classes with Margaret and has not only excelled in nose work, but gained a lot of confidence. Edge has earned his NW1 and NW2 with a lot of placements, and he is ready to enter NW3.”
– Melissa Chandler
“I have been taking classes with Margaret for many years. She is a wise and thoughtful trainer who really understands how dogs learn and what motivates them. She helped me set my training goals and understand how to reach them. I trained my Sophie through utility and I could not have done it without Margaret!”
– Tamar
“Margaret changed my life with my dog, Stella. Early on, Margaret taught me how the principles of freedom of choice for an animal combined with well timed reinforcement can lead to increased confidence, especially in an anxious or fearful dog. Margaret has truly transformed what I have been able to accomplish with Stella.”
– Alysa
About the Trainer
One Happy Dog is a dog training business led by Margaret Simek, a certified dog trainer and dog sports specialist who focuses on positive reinforcement methods. She offers private training sessions, group classes, and online courses designed for pet owners and dog sports enthusiasts alike. Margaret specializes in nosework and competition obedience, helping dogs and handlers build confidence, precision, and strong communication through science-based operant conditioning. Her training environment is supportive, playful, and tailored to each dog’s unique personality and needs, whether addressing basic manners, separation anxiety, reactivity, or high-level competition skills. She also provides in-home training, video reviews, and online class navigation tools to support clients remotely. Margaret emphasizes education for both dogs and humans, ensuring owners understand the principles behind the training to sustain long-term success.
She serves clients across the Chicago North Shore, including Arlington Heights, Evanston, Lake Forest, Mundelein, and many surrounding communities. Her facility is located at 403 Washington Blvd, Mundelein, IL, where in-person classes and private sessions are held. Margaret is known for her deep knowledge of learning theory, her compassionate approach, and her commitment to continuous professional development through advanced training with experts like Bob Bailey and Parvene Farhoody.
Accomplishments
Margaret Simek has dedicated her career to refining positive training techniques for pet owners and elite dog sports competitors. She has trained dogs to compete successfully in nosework (NW1, NW2, NW3) and obedience competitions. She has studied advanced training methods with Bob Bailey and Parvene Farhoody through Chicken Workshops, integrating precision reinforcement techniques into her curriculum. Her students consistently achieve high-level competition placements and resolve serious behavioral issues.
How to Get Started!
Prospective clients can contact Margaret via email or phone to discuss their goals and schedule an initial consultation. Private training, group classes, or online course enrollment can be arranged based on individual needs. Video reviews are available by submitting a training video and scheduling a follow-up call.

Contact Information
Availability
- Weekdays
- Weekends
- Morning
- Afternoon
- Evening
Certifications
- Credentialed
Associations
- APDT
- IAABC
- PPG
Languages
- English
Misc Features
- wheelchair accessible parking
Other Services Offered
- Pet trainer
Location
403 Washington Blvd, Mundelein, IL 60060Listing Tools for Trainers
For One Happy Dog Only
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