The poison used for culling rabbits can vary, but some common poisons include strychnine, phosphorus, and 1080 (sodium fluoroacetate). These poisons can cause serious health problems in humans, including nausea, vomiting, diarrhea, abdominal pain, seizures, and even death.
In some cases, the poison used for culling rabbits may not be immediately fatal, and the rabbits may suffer for a period of time before dying. This can lead to the accumulation of toxins in the rabbit's body, which can make them even more dangerous to consume.
For these reasons, it is strongly advised to avoid eating rabbits that have been poisoned for culling. If you are unsure whether a rabbit has been poisoned, it is best to err on the side of caution and not eat it.