Why one pellet is enough to endanger a cat
Cats are more sensitive to metaldehyde than dogs, and even a single slug bait pellet can deliver a lethal dose. Their smaller body size—typically 3-5 kg—means toxins concentrate faster in their systems. Unlike dogs, cats rarely drool or show obvious distress before neurological symptoms hit, so waiting for signs isn't an option.
The cat that ate the bait needs immediate vet care, even if they seem unaffected now. Metaldehyde causes violent muscle contractions that can lead to hyperthermia (dangerously high body temperature) in cats. Their delicate respiratory systems are also at risk—seizures may compromise breathing faster than in dogs.
How to check your other cats for exposure
Metaldehyde residue can cling to paws and fur when cats walk over treated areas. Inspect your other two cats under bright light—look for blue-green powder between toe beans or around the mouth. Use a damp cloth to wipe their faces and paws, but avoid baths (stress can worsen symptoms if they did ingest toxin).
Watch for subtle changes like excessive grooming or hiding—cats mask illness well. While the uneaten pellets pose the main threat, secondary poisoning from grooming contaminated fur is possible. Isolate all cats in a clean room while you search the house for spilled bait. Even one pellet under furniture could be fatal if found later.
The danger of shared grooming behaviors
Cats that groom each other may spread metaldehyde residue from one to another. If the exposed cat has bait powder on their coat, their housemates could ingest it while licking. Separate the cats until you're certain all are clean—use individual carriers or closed rooms if possible.
Check bedding and favorite lounging spots for blue traces. Cats often transfer toxins to these areas via their paws. The non-exposed cats may seem fine now, but metaldehyde's delayed onset means vigilance is key for 48 hours. Any twitching, dilated pupils, or uncoordinated movement warrants emergency care.
Why deep cleaning matters after exposure
Slug bait pellets can shatter into nearly invisible crumbs when stepped on. Vacuum all floors thoroughly—don't rely on sweeping—and wash hard surfaces with soapy water. Pay special attention to baseboards and under appliances where pellets roll. Cats' curiosity leads them to these hidden hazards.
Remove shoes worn outside—pellets stick to treads and get tracked indoors. Until the area is fully decontaminated, keep all cats confined to a safe room with fresh water and litter. Monitor the unaffected cats as closely as the exposed one—metaldehyde's rapid onset means their status could change in minutes.
For a dose worked out against your pet's weight, use the Slug Bait (Metaldehyde) Toxicity Calculator.