Green Acres Training Staff


"These trainers are awesome!!! You can tell they love dogs just as much as we do." M.F.

"The small number of students allowed a lot of one on one time and allowed for discussion of other issues that come up from week to week."

"Classes were great. Small enough so everyone could get help and have questions answered."

Voted Best 2017Best Of The Best 2017 Best Of The Best 2017


One of the hallmarks of classes at Green Acres is our small class sizes. We truly believe that to receive the best experience possible and to help you achieve your goals that personal attention is a must. It is not uncommon for us to have 2:5 instructors to student ratio so that we can better assist each team individually.

Led by Don Hanson, co-owner of Green Acres Kennel Shop and past President/Chair of the Association of Professional Dog Trainers (APDT), the Green Acres Training Staff has over 55 years of collective professional training experience and boasts two Certified Professional Dog Trainers (CPDT) and one Certified Dog Behavior Consultant (CDBC) on staff. All of our training staff are professional members of the Pet Professional Guild (PPG) and comply with the PPG Guiding Principles of force-free, fear-free, and pain-free training.

Lead Instructors


Don's Credentials | Don's CV | Don's Publications | Don's Speaking Engagements

Don HansonDon Hanson has been the co-owner of the Green Acres Kennel Shop in Bangor, Maine, where he is also the Director of Behavior Counseling and Training, since 1995. As a Certified Dog Behavior Consultant (CDBC), Certified Professional Dog Trainer (CPDT-KA), Bach Foundation Registered Animal Practitioner (BFRAP) and Associate Certified Cat Behavior Consultant (ACCBC), Don helps people and their dogs and cats with everything from minor training issues to serious behavioral problems such as separation anxiety, fear, and aggression.

Don is a past President/Chair of the Association of Professional Dog Trainers (APDT) and has been active in the APDT's educational programs since 1998. He is a member of the Pet Professional Guild (PPG) where he serves on the Steering Committee and as Chair of the shock-Free Coalition which is working to end the use of shock collars with dogs < >. Don is also the producer and co-host of The Woof Meow Show, and has lectured on pet issues in the USA, Canada, Japan and the Caribbean. He writes about pets on a regular basis in his blog (, and has a monthly column in Downeast Dogs News

Don and his wife share their lives with one dog (Muppy – Cocker SpanielX and two cats Thelma and Boomer).


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Kate Dutra, B.S., CPTC, CPDT-KA

Kate joined the Green Acres Team in 1992 and was our Kennel Manager until 2002, when she returned to the University of Maine and completed her degree in Sociology. After working in some other fields, Kate returned full time to Green Acres in 2008 and became the Operations Manager.

Kate has been a Certified Professional Dog Trainer since 2006. Kate also works with Don on behavior counseling and is the co-host of The Woof-Meow Show. Having worked the retail side of Green Acres for years, Kate is very knowledgeable about pet nutrition and products.

Kate and her family share their lives with 3 dogs, Lizzie, Cinder and Morgan (2 hound mixes and a lab) and 1 cat, Guido.


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Cristina Arrigoni Martelli, Lead Instructor

Cristina joined Green Acres as an assistant dog trainer in August of 2016. She has been around hunting dogs for most of her life and knew, since she attempted to “train” her first dog (her Dad’s) around the age of twelve, that she loved dogs above all else, and wanted to work with them. Cristina is working towards the necessary hours to sit for the Certified Professional Dog Trainer exam.

When Cristina is not at Green Acres and not teaching in the Honors College at the University of Maine, she is likely roaming the Maine woods with her Brittany, Eli. A Registered Maine Guide and avid bird hunter, dedicated to training her dogs with reward-based methods, Cristina can’t seem to get enough of exploring woods and streams any time of the year.


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Sarah Vickers, Lead Instructor

Sarah joined the Green Acres training team in 2013 after working with Don and Kate during a behavior consultation for her foster dog.  She has also been a student in Green Acres' classes with one of her own dogs.  Sarah is working towards her master's in Applied Behavior Analysis which focus' on the use of positive reinforcement and an applied approach to working with behaviors.  She is currently working toward the necessary instructing hours to take the exam to become a Certified Professional Dog Trainer.

Sarah works as a special education teacher in a behavior program in a local elementary school.  She leads an active lifestyle full of running, hiking and skiing.


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Lindsey Ware, Lead Instructor

Lindsay joined the training team in 2013 after being a Green Acres student with one of her own dogs. She credits her science and research background for giving her a passion for reward-based training methods and animal behavior. Lindsay is currently working toward the necessary instructing hours to take the exam to become a Certified Professional Dog Trainer.

Lindsay works full time in the biomedical field and enjoys hiking, running, and gardening in her spare time. She and her dog Gander are also a dedicated tracking team for the recovery of large game. Lindsay and her husband share their home with two black labs, Scoter and Gander, and a Russian tortoise named Maxine.


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Ashley Charpentier, Instructor

Ashley joined Green Acres Kennel Shop in 2016 and started working in our training program in 2017. She spends most of her time working in the kennel, keeping our client's pets happy and comfortable. She is also one of our dog training instructors, often assisting with as many as six classes per week. Ashley also works with some of our private training clients.

Ashley has two dogs, Landon and Emma


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