What immediate actions should I undertake if I discover that my dog has ingested rat poison? Considering the potentially grave consequences of such an occurrence, it is paramount to act expeditiously yet judiciously. Should I contact my veterinarian without delay, or is there a specific animal poison control helpline that I should reach out to for guidance? How do I ascertain the type of rat poison involved, as different formulations may necessitate varied interventions? Would it be prudent to induce vomiting, or could this action exacerbate the situation further? Furthermore, are there distinct symptoms I should vigilantly monitor as signs of rat poisoning, and how critical is timing in mitigating the risks associated with this alarming scenario? In what ways can I prepare for the vet visit, ensuring that I convey all the relevant information that could influence the treatment my dog might require?