By Rick Nathanson / Journal Staff Writer   As a precaution against highly pathogenic avian influenza, or HPAI, the Penguin Chill exhibit at the ABQ BioPark Zoo has been closed until further notice, BioPark officials said Tuesday. Most of the birds at the BioPark, including at Heritage Farms on the grounds of the Botanic Garden, were removed to their indoor shelters last week. Dr. Carol Bradford, the BioPark's senior veterinarian, said some birds at the zoo remain on exhibit, but their enclosures have been covered with tarps. Thus far, no birds at the BioPark have tested positive for the virus,...