Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.

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Frailty coordinator Georgia Zapparoli, who normally worked with people in their later years, said the 18 to 39 age bracket was key as "common themes" ran through the lifestyle of many older patients.

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