By Umberto BACCHI Agence France-Presse JOHANNESBURG, June 12, 2023 (AFP) — Zarza, a much-loved Staffordshire terrier, ended up at a South African animal hospital with a bite from a Mozambique spitting cobra on her snout. The snake’s powerful venom can stop the breathing muscles from working, but normally the bites are treatable with an antidote. The problem, say South African veterinarians, is that they currently have virtually no vials of the antiserum left. “We’ve been […]