In a study published earlier this year, findings provide evidence that there are significant differences in behavior for dogs who attend training before 6 months and dogs who do not.
Dogs who attended puppy training before 6 months of age were less likely to display:
If your puppy is older than 6 months but hasn’t started training, no need to worry! It’s never too late to start, and reward-based training at any age is better than no training.
You can read the entire study at this link: https://www.mdpi.com/2076-2615/11/5/1298/htm
Dinwoodie, I. R., Zottola, V., & Dodman, N. H. (2021). An Investigation into the Impact of Pre-Adolescent Training on Canine Behavior. Animals, 11(5), 1298. MDPI AG. Retrieved from http://dx.doi.org/10.3390/ani11051298