Rat Bait Poisoning in Pets UK — Rodenticide Emergency Guide

According to the RSPCA and BVA, most commercial rat and mouse baits in the UK contain anticoagulant rodenticides such as brodifacoum, bromadiolone, or difenacoum. These stop blood clotting, causing fatal internal bleeding — often with no early warning signs.

Pets are exposed by:

• Eating bait directly from trays, packets, or shed floors
• Secondary poisoning — eating rats or mice that consumed bait (especially cats)
• Children or neighbours placing bait where pets can reach it

Some newer products use different mechanisms, but all rodenticides should be treated as potentially lethal.

Anticoagulant effects typically appear 3–7 days after ingestion:

• Lethargy and weakness
• Pale or white gums
• Coughing or difficulty breathing (bleeding into chest)
• Blood in urine, faeces, or vomit
• Nosebleeds or bleeding from gums
• Bruising on skin or belly
• Collapse or sudden death

Because signs are delayed, never wait to see if your pet is okay.

1. Phone your vet or out-of-hours emergency clinic now
2. Call Animal PoisonLine (01202 509000) — vets can advise on product-specific risk
3. Bring the bait packet or label if you have it — active ingredient matters
4. Do not induce vomiting unless your vet instructs you

Veterinary treatment may include:

• Induced vomiting and activated charcoal if ingestion was very recent
• Vitamin K1 for weeks — essential for anticoagulant reversal
• Blood transfusion or plasma if bleeding has started
• Serial blood clotting tests (PT/PTT)

Hospitalisation is common when bleeding is suspected or confirmed.

According to PDSA and the RSPCA:

• Never use loose bait where pets can access it
• Prefer professional pest control that uses secured bait stations
• Store unused bait locked away from pets and children
• Check sheds, garages, and gardens after neighbours treat rodent problems
• Consider humane traps or professional exclusion instead of poison where pets roam
• Keep cats indoors at dusk if bait is used locally — secondary poisoning is a real risk

If you must use bait, place it only in tamper-proof stations bolted or fixed where dogs cannot reach. Cats hunting poisoned rodents remain at risk — discuss safer alternatives with a pest controller.

Cats are less likely to eat sweet bait directly but frequently poison themselves by eating rodents that have consumed anticoagulants. According to Animal PoisonLine, even one poisoned mouse can deliver a toxic dose. Outdoor cats in areas with active rodenticide use need extra vigilance.