To protect pets from health risks at dog parks, owners should ensure their dogs are fully vaccinated and up-to-date on all parasite prevention, including heartworm. It’s essential to observe the park’s environment and the behavior of other dogs; avoiding interactions with aggressive dogs is crucial. Always bring fresh water to prevent the pet from drinking contaminated water sources. Regularly checking the dog for fleas and ticks after park visits and maintaining a clean coat can also help mitigate risks. Lastly, be vigilant and proactive in monitoring your dog’s health and behavior.