The giraffe was born at sunrise in June, deep in Druid Hill Park, and appeared hooves first. Doe-eyed and tawny, he looked around with his head tilted to one side, like a curious puppy.
It was an endearing posture that won the calf, named Julius, admirers far beyond the Baltimore zoo.
It was also a sign that something was wrong.
In July, veterinarians made the wrenching decision to euthanize only the second giraffe born in 20 years at the Maryland Zoo in Baltimore. Now they are revealing what they learned through subsequent investigation: A...