Are senior dogs more susceptible to parasites or infections?

• A. Yes—immune function can decline with age, so maintain preventive care and regular vet checkups.
• B. No, seniors are less susceptible.
• C. Only if living outside year-round.
• D. Parasites affect only young dogs.

Answer: (A)

Aging can weaken the immune system, so senior dogs are more vulnerable to parasites and infections. This reduced immune function—along with age-related health issues and medications—can make it easier for infections to take hold and harder for the body to fight them off. That’s why preventive care is essential: keep parasite prevention year-round, schedule regular vet checkups, and keep vaccines up to date where appropriate, while watching for subtle signs like changes in appetite, energy, or digestion. Being indoors or outdoors doesn’t eliminate risk, and parasites don’t only affect young dogs. Proactive prevention and early detection help maintain quality of life as dogs age.