Add spaces: [1]AccordingtotheAmericanVeterinaryMedicalAssociation's'GuidelinesfortheEuthanasiaofAnimals'settingforthaninternationallyacceptedstandardforhumaneeuthanasia,onlytheintravenousinjectionofeuthanasiadrugssuchasBarbitalSalt(Pentobarbital)ispermittedfortheeuthanasiaofdogs.
[1] According to the American Veterinary Medical Association's 'Guidelines for the Euthanasia of Animals' setting forth an internationally accepted standard for humane euthanasia, only the intravenous injection of euthanasia drugs such as Barbital Salt (Pentobarbital) is permitted for the euthanasia of dogs.