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James O'Brien CPDT-KA
CPDT-KA, Certified Professional Dog Trainer — Certified Dog Trainer & Behaviour Specialist
James O'Brien holds the CPDT-KA credential from the Certification Council for Professional Dog Trainers. With 14 years of hands-on experience in positive-reinforcement training, he leads reviews of training tools, harnesses, collars, enrichment products, and all behaviour-related content on this site. He has worked with over 3,000 dogs across breed types and temperaments.
✍ 5 articles published
Areas of Expertise
Published Articles (5)
Gear
Dog Harness vs Collar 2026: Which Is Right for Your Dog?
Choosing between a harness and collar depends on your dog's breed, size, and behaviour. A certified trainer breaks down ...
Dog Care
Best Dog Shampoo 2026: 8 Shampoos Tested for Coat & Skin
We tested 8 popular dog shampoos on real dogs to evaluate lather, rinsability, scent, skin reaction, and coat results. H...
Cat Care
Best Cat Trees 2026: 7 Trees Tested for Stability & Scratching
We tested 7 top-rated cat trees for stability, scratching durability, and overall build quality to help you find the per...
Gear
Best Dog Crates 2026: 6 Crates Tested for Safety & Comfort
We tested 6 popular dog crates for safety, durability, and ease of use. From wire to soft-sided, here are the best optio...
Fish & Aquarium
Best Aquarium Filters 2026: 7 Filters Tested for Clean Water
We tested 7 top aquarium filters for freshwater tanks from 10 to 75 gallons. From hang-on-back to canister filters, find...