What two signs show that yourcat may have been poisoned? Is it A? They slow blink at you. B? Difficulty breathing. C? Vomiting or D, they scratch more? And the correct answers were B, difficulty breathing, and C, vomiting. It wasn’t the answer D, they scratch more, that’s typically not a sign of internal poisoning. And it wasn’t the answer A, they slow blink at you. This is generally a positive, relaxed behaviour we see from cats.