Why overnight blue cheese is different from fresh
The mold growing on your cheese produces tremorgenic mycotoxins—compounds that directly affect the nervous system. These toxins multiply rapidly in room-temperature conditions, especially in high-moisture foods like blue cheese. A cat's smaller body size means even a few licks can deliver a concentrated dose, unlike larger animals that might tolerate minor exposure.
Your cat's age doesn't make her more resistant—adult cats lack enzymes to break down these toxins efficiently. The trembling you're seeing suggests the mycotoxins are already disrupting nerve signals. This isn't a 'wait and see' situation; tremors can escalate to seizures or respiratory failure without rapid treatment.
What happens in the first 90 minutes
Mycotoxin absorption begins almost immediately after ingestion. You might notice excessive drooling first as the bitter taste irritates her mouth, followed by twitching whiskers or shaky paws within 30 minutes. These early tremors often start in the face before spreading to limbs—a hallmark of mold toxicity.
Her heart rate may increase as the toxins stimulate the nervous system. Don't try to comfort-feed her or induce vomiting; this could worsen tremors. Keep her in a dim, quiet space to reduce sensory stimulation while preparing to transport her. Grab the cheese wrapper so the vet knows the mold strain.
Why emergency care can't wait until morning
Unlike some toxins that cause gradual organ damage, tremorgenic mycotoxins act fast. Veterinary teams use muscle relaxants and IV fluids to protect against dehydration from tremors—treatments that require monitoring equipment you don't have at home. Every minute counts to prevent overheating from uncontrolled shaking.
Even if tremors seem mild now, secondary risks like hyperthermia or choking on saliva make this urgent. Clinics prioritize these cases because delaying care by even two hours often means needing intensive care instead of outpatient treatment. Call ahead so they're ready with anti-seizure medications.
The recovery timeline after treatment
With prompt care, most cats show improvement within 4-6 hours as medications counteract the toxins. She'll likely stay hospitalized for 12-24 hours because some mycotoxins cause rebound tremors as they metabolize. Vets monitor her temperature and hydration closely during this phase.
Expect her to be wobbly for a day or two post-discharge—this is normal as her nervous system resets. Provide easy-access water and soft food in a confined space. Future mold exposure could trigger worse reactions, so store all cheeses (especially blue varieties) in sealed containers far from counter edges.
The step-by-step response, from the first minute to the vet visit, is in our Moldy Food, Compost & Bin Raids emergency guide.