Why potting soil and mulch pose hidden risks for cats
Even if you don’t use slug bait directly, your cat may encounter it in garden products labeled as soil conditioners or slow-release fertilisers. These often contain the same blue-green pellets, which cats find intriguing due to their granular texture and slight sweetness. A 5 kg cat licking its paws after stepping on treated soil could ingest enough metaldehyde to cause harm.
The danger multiplies with indoor plants—pellets sprinkled on the surface can stick to your cat’s fur during brushing against the pot. Watch for early signs like drooling or twitching, which suggest they’ve groomed contaminated paws. Unlike dogs, cats rarely eat large amounts at once, but their smaller size makes even minor exposure risky.
How grooming turns low exposure into a threat
Cats self-clean meticulously, so trace amounts of metaldehyde from walking over treated areas can accumulate over hours. For a 5 kg cat, repeated tongue licks to remove granules from their paws may deliver a toxic dose. The pellets’ sweet smell encourages this behavior, making it harder to prevent ingestion once contamination occurs.
Check between your cat’s toes if you’ve used granular garden products—blue-green residue is a red flag. Symptoms like restlessness or dilated pupils often appear before severe tremors, giving you a narrow window to act. Delay worsens outcomes, as metaldehyde disrupts nerve function progressively.
Why mulch isn’t as innocent as it looks
Some mulches contain slug bait as a dual-purpose pest deterrent, blending pellets into the material where they’re less visible. A curious cat digging or rolling in mulch could get pellets stuck to their coat, leading to ingestion during grooming. Even “pet-safe” mulch brands sometimes include metaldehyde under vague terms like “pest control additive.”
For a 4–5 kg cat, ingestion via mulch poses a stealthier risk than direct bait consumption—you might not notice the pellets until symptoms emerge. Metaldehyde’s rapid absorption means waiting for signs isn’t safe; if you suspect contact, wipe your cat’s paws and fur with a damp cloth immediately.
When indirect exposure demands a vet visit
If your indoor cat shows sudden coordination loss or muscle rigidity after being near potted plants or garden supplies, assume metaldehyde poisoning until proven otherwise. These symptoms can escalate to life-threatening seizures within an hour, especially in lighter cats under 6 kg.
Bring samples of any soil or mulch your cat contacted—vets can test residues to confirm exposure. Don’t rely on induced vomiting; metaldehyde’s swift absorption makes professional decontamination critical. Cats hide pain well, so subtle changes like excessive meowing or hiding warrant urgent checks.
For a dose worked out against your pet's weight, use the Slug Bait (Metaldehyde) Toxicity Calculator.