Why "research-backed" actually means something here
Most dog-training advice is opinion dressed up as fact. Ours isn't. Every Pup Class method is grounded in peer-reviewed behavior research — studies showing that aversive tools carry documented welfare costs with no demonstrated advantage over reward-based training. We don't fabricate stats or sell dominance myths; we cite the science, and you can read it for yourself below.
The evidence base spans decades and dozens of studies. Guilherme Fernandes, Olsson & Vieira de Castro (2017) reviewed the literature and found that aversive-based methods are correlated with stress-related behaviors, elevated cortisol, and problem behaviors like fear and aggression. Casey et al. (2021) used a cognitive bias test — a measure of underlying emotional state, not just in-the-moment stress — and found that dogs whose owners used two or more aversive methods were significantly more pessimistic. Bradshaw, Blackwell & Casey (2009) argued that "dominance" has no scientific basis as a trait of individual dogs and that the concept leads to confrontational training practices.
This isn't one or two cherry-picked papers. It's the weight of published behavior science — 47+ peer-reviewed sources across 11+ Q1 journals — all pointing the same direction: reward works better, lasts longer, and doesn't cost your dog their welfare.
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- Vieira de Castro, A.C., Fuchs, D., Morello, G.M., Pastur, S., de Sousa, L., & Olsson, I.A.S. (2020). Does training method matter? Evidence for the negative impact of aversive-based methods on companion dog welfare. PLOS ONE, 15(12), e0225023.
- Vieira de Castro, A.C., Barrett, J., de Sousa, L., & Olsson, I.A.S. (2021). Improving dog training methods: Efficacy and efficiency of reward and mixed training methods. PLOS ONE, 16(2), e0247321.
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- Casey, R.A., Naj-Oleari, M., Campbell, S., Mayfield, M., & Sherwin, A. (2021). Dogs are more pessimistic if their owners use two or more aversive training methods. Scientific Reports, 11, 19023.
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