Dogs become less curious and less active as they grow older, but dogs that are the most curious and active as puppies are also the most curious and active when they are older compared with other dogs their age, according to a study in Scientific Reports. Attentiveness and problem-solving abilities improve until dogs are about 6 years old and then stabilize; curiosity about new objects begins to decline around age 3; and dogs' desire to socialize and tolerance of frustrating situations remain about the same throughout their lives.
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