German Shepherd on a leash beside its handler

Reactive & problem dogs

Behavior Modification

Leash reactivity, dog aggression, resource guarding and nerves: the cases other trainers turn away are what we work on every week.

The short answerRiedel K9 trains reactive, aggressive, fearful and resource-guarding dogs in Middletown, DE through board & train and private lessons, not group classes. Every case starts with an evaluation so Training Director Nelson Miller can see the behavior, explain why it’s happening, and build a plan that also teaches you how to handle your dog.

What we work on

Problems we solve.

Leash reactivity

Lunging, barking or spinning at dogs, people, bikes or cars on walks.

Dog aggression

Fighting or posturing with other dogs, at home or in public.

Resource guarding

Growling or snapping over food, toys, rooms, furniture or people.

Fear & nerves

Shut-down, skittish or anxious dogs that need confidence building.

Leash biting

Dogs that fight, mouth or bite the leash and handler.

Livestock & prey drive

Chasing chickens, cats or wildlife. Yes, we’ve fixed that too.

Board and train Rottweiler Koda sitting by a fence after training

Our approach

Understand it. Then change it.

“Nelson thoroughly explains dog’s issues, why they’re acting the way they are, his approach to the situation, and why he does it.” (Joe L.)

Behavior problems are rarely random. We look at temperament, drive, history, and how the dog and family communicate, then build structure, clear boundaries and new habits that hold up in the real world.

Safety comes first. Dog- or people-aggressive dogs work privately or in a board & train, never in group class, and we bring you into the process so you can keep your dog successful at home.

The process

From evaluation to everyday life.

  1. 01

    Evaluate

    We see the behavior first-hand and learn your dog’s history and triggers.

  2. 02

    Plan

    We recommend board & train or private lessons with a clear timeline.

  3. 03

    Train

    Structure, obedience and controlled exposure, built step by step.

  4. 04

    Transfer

    Hands-on coaching so you can hold the line at home and in public.

From our clients

Real dogs. Real owners.

“I took my female German Shepherd here for the board and train program, and she came back as a completely different dog. She used to not let anyone in certain rooms in the house, and now has no problems — as well as made it possible for her to go on walks surrounded by other dogs, without any reactivity. I would 100% send any of my future dogs back without hesitation.”

Rawlins M. Google review · Board & Train

“Very professional, highly skilled, and they help not only your dog, but you and how you handle your dog. I took both of my dogs there, one is very problematic with many issues. Nelson worked a mini miracle helping my dogs integrate into my home life in a safe and effective way. It has been a blessing in my life.”

Kathleen H. Google review · Behavior

“Their care and love for dogs is apparent from the very beginning. I was apprehensive about leaving my pup with someone else, but after seeing their interaction at our first training session I was immediately put at ease. As the weeks progressed and I could see the changes in my dog and the bond he had formed with Nelson, I was blown away. They worked no less than a miracle.”

Eric Google review · Board & Train

Read all reviews

FAQ

Behavior Modification questions

Do you train reactive or aggressive dogs?

Yes. Leash reactivity, dog aggression, resource guarding and fear-based behavior are a big part of what we do, through board & train, behavior modification and private lessons. For safety, dog-aggressive or people-aggressive dogs can’t attend group classes, but we’re happy to work with them privately.

Keep exploring

Related programs

Our flagship program

Board & Train

Your dog lives and trains daily with the Riedel K9 team, in our facility and out in the real world, and you come weekly for a private session so you can keep it going at home.

  • Reactivity & aggression
  • Off-leash reliability
  • Busy families
Learn more

Levels 1 · 2 · 3

Group Obedience Classes

Five-week, hands-on classes that take you and your dog from the basics to rock-solid obedience around real-world distractions.

  • Puppies & adult dogs
  • Leash manners
  • Recall & stay
Learn more

One-on-one coaching

Private Lessons

Focused, customized sessions built around your dog’s specific issues and your goals, at your pace.

  • Specific problems
  • Dogs not suited to groups
  • Flexible scheduling
Learn more

Start today

There’s a better dog in there.

Every program starts with a conversation. Tell us about your dog and we’ll recommend the right path, whether that’s classes, private lessons, or a full board & train.