Why a 2.5 kg kitten reacts faster than an adult cat
That bright green sprout contained concentrated solanine, which attacks the nervous system. At 10 weeks old and barely over 2 kg, your kitten's body lacks the enzymes adult cats use to break down small amounts of this toxin. The vomiting you're seeing means their system is overwhelmed—solanine irritates the stomach lining directly while also disrupting nerve signals.
Kittens this young dehydrate dangerously fast from vomiting. Their small size also means the same sprout delivers a higher toxin dose per kilogram than it would to a full-grown cat. Watch for wetness around the mouth or sunken eyes, which suggest fluid loss is accelerating.
The first signs that demand immediate vet care
Dilated pupils often appear within 2-4 hours as solanine interferes with muscle control in the eyes. You might notice your kitten stumbling or seeming unusually uncoordinated—this toxin causes temporary paralysis in small nerves. Any twitching or tremors mean the nervous system is under severe stress.
Breathing changes are critical at this stage. If their chest moves rapidly while resting or they pant like a dog, the toxin is affecting diaphragm control. Don't wait for all symptoms to appear; early intervention greatly improves outcomes for solanine poisoning.
Why home care isn't safe for sprout ingestion
Unlike some toxins that pass through the gut unchanged, solanine absorbs quickly through the stomach lining. By the time vomiting starts, some toxin has already entered the bloodstream. Inducing vomiting at home could worsen dehydration without removing enough solanine to matter.
Kittens often need IV fluids to protect their kidneys from toxin damage, plus medications to control nausea and seizures if they develop. A vet can also monitor heart rhythm—solanine sometimes causes dangerous irregularities that aren't visible to owners.
How the next 12 hours could unfold
With prompt treatment, most kittens show improvement within 6-8 hours as the toxin clears. Vets typically keep them overnight for observation because symptoms sometimes rebound. Without care, the vomiting may stop temporarily while neurological signs worsen—this false improvement delays critical care.
Recovery usually takes 24-48 hours. Your kitten might be wobbly for a day afterward as their nervous system recalibrates. Provide a warm, quiet space and offer small licks of water once the vet approves it. Follow-up blood tests ensure no lasting liver stress from the solanine assault.
The step-by-step response, from the first minute to the vet visit, is in our Potato Plant Poisoning in Dogs and Cats emergency guide.