Why 2.5 kg makes a walnut-sized blob dangerous
For your petite cat, that pesto blob represents a much higher dose per kilogram than for an average 7 kg feline. Cats lack liver enzymes to process garlic compounds efficiently, and their red blood cells are uniquely vulnerable to oxidative damage. The walnut-sized amount likely contained a whole clove’s worth of garlic when adjusted for her tiny body mass.
Pine nuts in pesto add another risk — cats struggle to digest plant fats, possibly causing yellow-tinged vomiting later. Cheese brings lactose many adult cats can’t break down, leading to cramping that masks more serious garlic toxicity signs.
The hidden timing of feline garlic poisoning
Unlike dogs who often vomit promptly, cats may show no signs for 24–72 hours after eating garlic. This delayed reaction fools owners into thinking all is well. Your cat’s first symptom might be refusing favorite high-perch spots — anemia makes climbing exhausting before other signs appear.
Check her litter box for dark, tarry stools indicating intestinal bleeding from irritant compounds. Cats hide illness instinctively; if she seeks solitude under beds instead of following you, assume something’s wrong even without obvious vomiting.
How rescue status complicates risk assessment
Former street cats often have underlying conditions from malnutrition or parasites that reduce their resilience. Your rescue’s unknown history means she might lack nutrient reserves to combat toxin exposure. Pale gums in a cat already prone to anemia could reach critical levels faster than in a healthy pet.
Watch for subtle hydration clues — if the skin over her shoulders moves loosely when she walks or her third eyelids become visible, these suggest dehydration worsening the garlic’s effects on her kidneys.
When to override a cat’s stoic nature
Cats rarely drool or gag like dogs do, so don’t wait for dramatic signs. If she turns away from food for more than 12 hours or her breathing seems slightly faster than normal (over 30 breaths per minute at rest), assume internal distress.
Any yellow discoloration in her eyes or gums indicates liver involvement — this transforms a monitoring situation into an immediate vet visit. Small cats have less margin for error; it’s always safer to have bloodwork done 24 hours post-exposure than to wait for collapse.
The full verdict, portion guidance and serving notes are collected on the Pesto food facts page.