A new dog swimming facility is offering hydrotherapy for aging pets, good news for owners of older dogs with worn-out joints.

• Water Bark opened about a month ago, offering swim sessions for fun, training, and therapy.
• Swimming takes the weight off dogs' joints, restores movement, and boosts blood flow.
• Older dogs benefit most, since years of wear break down their bodies even as they live longer.
• Owners often stay to watch and take photos, treating their dogs like family members.

Outlook: Demand for pet therapy services should keep growing as dogs live longer and owners spend more on their care.