Which of the following is a characteristic of the Juvenile Period in dogs?

• A. Permanent teeth come in
• B. Increased attention span
• C. Longer working memory
• D. Slow excitation

Answer: (A)

In dogs, the Juvenile Period is defined by the transition from puppy teeth to permanent teeth. Puppies start with deciduous teeth and begin to replace them with permanent dentition around 4–6 months, with completion varying by breed size. This dental eruption is the hallmark of the stage and has practical implications for training and mouthing behaviors, since teething can drive increased chewing and oral exploration. The other statements don’t describe this developmental milestone: attention span is typically shorter in juveniles, not longer; working memory isn’t generally longer during this period; and excitation tends to be higher rather than slower.