There is nothing natural, however, about dogs that aren’t familiar with one another to be put in large groups and expected to play together. Many of us just accept the assumption that dog parks are good places to socialize a dog, but that may not be the case. The socialization myth. Nick Hof, a certified professional dog trainer and chair of The Association of Professional Dog Trainers, explained that in terms of canine behavior, the term “socialization” isn’t just dogs interacting or “socializing” with other dogs, but rather, “the process of exposing young puppies under 20 weeks to new experiences.” This helps them have more confidence and adapt to new situations, Mr. Hof said. Though socialization is critical for the healthy development of puppies, the dog park is not where you want to bring your puppy to learn about appropriate interactions with other dogs, Mr. Hof added. Especially for urban dogs that don’t have backyards to exercise in, dog parks can sound like a great idea. Surprisingly, canine behavior experts aren’t so sure.