Longevity

Dog supplement ratings and clear verdicts approved by the veterinarian named on each article.

72 guides in this section.

Why Giant Breed Dogs Age Faster Than Small Breeds

A vet explains the biology behind why a 150-pound mastiff is often geriatric at seven while a 12-pound terrier is still middle-aged — and what that means for how you care for a large dog.

Why a Senior Dog Pants More Than Usual at Rest

A veterinary ophthalmologist explains what resting panting in an older dog can and can't tell you, the short list of causes worth ruling out, and when the sign is genuinely urgent.