The socialisation period in puppies, spanning roughly from 3 to 12 weeks of age, is critical for shaping future behaviour and emotional stability. In a study published in Animals, Lisa Stolzlechner and colleagues investigated whether introducing controlled “challenge” exercises between 3 and 6 weeks could enhance puppies’ ability to cope with stress and novelty later in life.
The research involved 83 puppies from 12 litters of various breeds. Each litter was divided into two groups: a treatment group that received structured exposure to mild challenges—such as novel objects, problem-solving tasks, and carefully graded noise stimuli—and a control group that engaged only in gentle play and handling. The challenge exercises were designed to stimulate early cognitive and emotional development without overwhelming the puppies.
At 6–7 weeks of age, the treatment group displayed greater boldness toward novel objects, lower startle responses to sudden noises, and faster recovery from stress compared to controls. These puppies also performed better in problem-solving tasks, showing higher persistence and engagement. Interestingly, the control group, which experienced more social handling, showed greater sociability toward strangers, suggesting that even gentle human contact has its own developmental benefits.
However, when the puppies were assessed again at six months using standardized personality questionnaires, no long-term behavioural differences remained between groups. The researchers propose that to achieve lasting effects, such challenge-based socialization should continue through the full socialisation window and possibly beyond.
This study underscores the importance of early, positive exposure to mild challenges during development—helping puppies grow into confident, adaptable adult dogs. Yet, as Stolzlechner et al. emphasize, consistent reinforcement and continued training are key to maintaining these early gains.
Source: Stolzlechner, L., Bonorand, A., & Riemer, S. (2022). Optimising Puppy Socialisation–Short- and Long-Term Effects of a Training Programme during the Early Socialisation Period. Animals, 12. Published November 1, 2022.
