A mysterious respiratory illness is affecting dogs in many states, including Maryland. .
Vets first discovered the illness a few months ago and they're still searching for answers to the sickness that mimics kennel cough.
The illness is likely spread through close contact, so vets are advising dog owners to ensure their pups are up to date on their vaccines. Vets say it may also be wise to distance your dog from close-contact areas, like crowded dog parks. (USA Today)
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