Other species of birds at the zoo include ostriches, Silver pheasants, peacocks, flamingos, blue-and-yellow macaws, owls, cockatoos and cockatiels. The zoo's veterinary clinic includes a separate entrance and is accessible to the public without entry to the zoo. Sofia Zoo is currently in the process of upgrading its facilities to meet current European standards in preparation for becoming a full member of the European Association of Zoos and Aquaria (EAZA). In 2009, the central heating at the zoo was shut down because the gas supply into the country was stopped by Russia due to a pricing dispute. About a third of the 1,300 animals at the zoo were vulnerable to the resulting cold and employees had to find portable electric and oil heaters to heat their enclosures.