This is the part (applicable to many working breeds) that most people don't understand, and it can make for a very tough life for both dog and owner. Any dog that was bred to have a job should have a job, even if that job is just retrieving sticks for hours. People go "that husky/collie/shepherd/boxer puppy is so cute, I just have to take it home!" and bring it back to their 1 bedroom apartment in the middle of the city and expect it to do fine with a 10 minute walk once a day. It's very frustrating and very sad to see this happen. The dog isn't happy without stimulation, the owner isn't happy with their destructive nature. They can also be some of the hardest to socialize properly and might become aggressive to others in such a situation, especially with all that pent-up energy. Just like with fish, people need to do their research before buying or adopting a puppy!