The first 12 hours home are critical
Your 4 kg cat's small size means even trace persin amounts hit harder. Watch the clock—if vomiting restarts within 6 hours of discharge, the toxin may still be circulating despite initial treatment. Hydration is key; offer a teaspoon of water every 20 minutes rather than free access. Dehydration sneaks up on cats, especially after gut irritation.
Check litter boxes for diarrhea or unusually small stools—both signal lingering digestive upset. The vet likely gave anti-nausea meds that last 8-12 hours; when they wear off, you may see a brief resurgence of symptoms. This doesn't always mean backtracking, but note timing for your follow-up call.
Activity level tells more than appetite
Cats often refuse food post-treatment, but lethargy is the real red flag. A recovering cat should show interest in surroundings, even if not eating. Track whether she grooms, reacts to noises, or shifts positions while resting—subtle engagement matters. Persin can cause muscle weakness, so stumbling or reluctance to jump indicates lingering effects.
Compare her breathing rate to pre-exposure norms. Normal is 20-30 breaths per minute while resting; count rises when her chest moves. Elevated rates after 24 hours could mean heart strain or pain. Don't confuse sleepiness with recovery—deep unresponsiveness warrants an immediate callback.
Bland food transitions over three days
The vet's prescribed diet isn't just about easy digestion—it's calibrated to avoid refeeding syndrome after toxin stress. Stick to their schedule strictly for the first 48 hours, even if she seems hungry. Adding treats or regular food too soon can retrigger pancreatitis, a common avocado complication.
When reintroducing normal food, mix 25% old food with 75% bland for two meals before increasing. Watch for softer stools during transition—this expected change differs from diarrhea's urgency or mucus. Probiotics may help, but ask your vet before adding anything to the prescribed regimen.
Long-term monitoring for small patients
For a 4 kg cat, full recovery takes up to a week even after symptoms fade. Weigh her daily—loss over 5% (200 grams) signals trouble. Use a kitchen scale for accuracy; subtle weight changes precede visible decline in small bodies.
Schedule a recheck even if she seems fine—bloodwork can reveal lingering liver or heart stress before clinical signs appear. Mention any future vomiting episodes, as avocado sensitivity sometimes persists. This isn't over at 48 hours; it's the start of rebuilding her reserves safely.
The step-by-step response, from the first minute to the vet visit, is in our Avocado Poisoning in Dogs and Cats emergency guide.