Certified Trainer: Madelyn Underwood

Madelyn Underwood is a graduate of the internationally-esteemed Karen Pryor Academy, and has held her certification as a KPA-CTP since 2020.

Madelyn has trained professionally in both a board and train capacity and as a private instructor, and served dogs and their clients all over the country before settling in Atlanta. She brought her behavior expertise to the veterinary field before ultimately being recruited to join the Peach on a Leash team.

She strives to stay up to date with current knowledge in animal behavior and training through attending continued education seminars and conferences.

When Madelyn isn’t training dogs, her typical day consists of weight lifting and spending quality time with her bully mutt, Rocco.

Madelyn serves in-home dog training clients in: Marietta, Smyrna, Canton, Woodstock, Buckhead

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Upcoming Classes

Reactive Dog Class: August 2026 (Peachtree Corners)

Sunday, August 23, 2026 - Sunday, October 4, 2026
9:00 am - 10:00 am
Spalding Animal Hospital, Peachtree Corners

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Puppy Class: August 2026 (Peachtree Corners)

Sunday, August 23, 2026 - Sunday, October 11, 2026
10:30 am - 11:30 am
Spalding Animal Hospital, Peachtree Corners

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Praise

We were SO sad when our 6 training sessions with our (then) 9 week old golden retriever Dolly came to an end. Courtney was so amazing. She listened, cared, and was very invested in Dolly's progress. Not only that, but she successfully handled a last minute inclusion of our 5 year old for the first session, which isn't for the faint of heart.

Courtney accomplished what we were hoping for, which was a great foundation for our puppy (but mostly for us!) to make her a great dog for life. Within one session, Dolly was rolling with 4-5 commands. By the end of our 6 weeks, we were confident we all had the tools we needed. We'll miss Courtney's visits!

—Kim, client

My puppy, Libby, just completed the puppy training program and I couldn’t be happier with the results. Our trainer, Mandy, was simply amazing. She taught us so much but was also so caring and invested in our progress. Libby and I both looked forward to each of our six sessions and I’m absolutely amazed at the progress made in such a short period of time. We miss Mandy already!

Peach on a Leash offers the best training available and has the best customer experience commitment I’ve encountered. You will not be disappointed if you trust them with your pup!

—Allie, client

“Alex is absolutely AMAZING! She is an erudite trainer, dedicated, caring and implements positive behavioral techniques that our sweet Fisher responds to almost immediately. She communicates clearly and efficiently during our sessions and follows up with a written recap and plan of action. Would recommend her in a heartbeat!”

—Ellie, client

I cannot say enough about our experience with Julia. Our dog shows more obedience and trust with me after our five sessions with her. She is knowledgeable, confident and fun! I feel better equipped to be the best doggie mom I can be because of her. A million thanks!

—Amanda, client

We do the in-house training and it has been and wonderful experience so far. They have amazing training techniques, all are working very well. We had a puppy who could not go potty outside and now she is, and is learning new commands every training visit.

Amelia Cosmas is our trainer and she is superb, she makes you feel very comfortable and has lots of great information not just with training but with other things like socializing, enrichment and day to day puppy and dog care. We would recommend Peach on a Leash to anyone looking for a positive training expierience that helps you bond with your new puppy or dog and also most important wonderful trainers that you look forward to seeing and working with.

—Monica, client

Highly recommend Peach on a Leash! My dog, Archie, and I worked with Kailin for a few months and she was fantastic. She was very patient with Archie and took the time to show me how to replicate her training with him myself. She always provided post session notes with everything we discussed. She also brought a birthday cookie for Archie's birthday and a graduation cap when he finished his training, which made my heart so full.

The company's scheduling process for sessions is also seamless and allows for very easy re-scheduling. Thank you Peach on a Leash!

—Amanda, client

We had an excellent experience working with Peach on a Leash and would highly recommend them for your pup training needs! Our trainer Frankie was wonderful at working with us and our pup to target a few specific behaviors in a way that was positive, easy to understand and, importantly, sustainable for us to implement after our training program wrapped up.

After every session, she would follow up with the notes and exercises we discussed and worked through that are so helpful to refer back to. We are grateful for her guidance, and our pup will surely miss meeting with her!

—Catherine, client