How long does rat poison take to work on mice? - briefly
Anticoagulant bait typically starts killing mice within 12–48 hours, with most deaths occurring by 3–5 days after ingestion. The exact timing varies with poison formulation, concentration, and the individual’s health condition.
How long does rat poison take to work on mice? - in detail
The interval between ingestion of a rodenticide and observable effects in mice varies with the active ingredient, dose, and physiological condition of the animal.
- Anticoagulant baits (e.g., warfarin, brodifacoum): onset of internal bleeding typically appears 2–5 days after consumption; death usually occurs within 4–7 days if the dose is lethal.
- Acute neurotoxic poisons (e.g., bromethalin, zinc phosphide): symptoms such as tremors, paralysis, or respiratory distress emerge within 30 minutes to 4 hours; mortality often follows within 6–12 hours.
- Metabolic poisons (e.g., phosphine‑generating compounds): lethal effects can begin as early as 15 minutes, with most deaths recorded within 2 hours.
Key factors influencing the timeline
- Amount ingested – larger doses accelerate symptom development and reduce survival time.
- Age and health – juveniles and weakened individuals metabolize toxins more slowly, extending the latency period.
- Formulation – liquid baits are absorbed faster than solid blocks, shortening the time to effect.
- Environmental temperature – higher temperatures increase metabolic rates, hastening toxin action.
Typical progression of signs
- 0–4 hours: reduced activity, loss of appetite, mild tremors (neurotoxic agents).
- 4–24 hours: pronounced lethargy, labored breathing, visible bleeding from orifices (anticoagulants).
- 24–72 hours: severe hemorrhage, organ failure, eventual death if untreated.
Monitoring recommendations
- Observe bait stations continuously for the first 24 hours.
- Record the time of first symptom appearance to estimate potency and adjust control measures.
- Dispose of dead rodents promptly to prevent secondary poisoning of predators.
Understanding these timelines enables effective pest management and reduces the risk of unintended exposure.