1. She was given no emotional security at the most influential stage of her life - early puppyhood.

2. This is a strong-willed and sometimes rather aggressive breed, which needs firm handling from puppyhood.

3. Chewing is a very natural dog behavior that often starts in puppyhood when a dog starts to teethe .

4. Basically, an adult dog's temperament and behavior habits, both good and bad, are shaped during puppyhood—very early puppyhood, " says veterinarian and leading animal behaviorist Dr."

5. Other people prefer a dog that is out of puppyhood and has already been civilized.

6. This might go some way to explaining the oft-repeated observation that dogs are permanently stuck in a kind of puppyhood.