Why the next two days are critical for your 4 kg cat
The first 48 hours after raisin ingestion are when kidney damage typically shows up, even if your cat seemed fine at the clinic. The intravenous fluids your vet started help flush toxins before they crystallize in the kidneys, but this protection needs time to work. You might notice her drinking more water than usual—that's the body trying to compensate.
Blood tests will track two kidney markers: creatinine (which rises when filtration slows) and BUN (blood urea nitrogen). These numbers often peak around day two. Your vet will compare them to the baseline taken during treatment. Don't panic if they're elevated; the question is whether they stabilize with fluids.
What kidney recovery looks like at home
Appetite is your best indicator. Cats with kidney stress often refuse food entirely or take one bite and walk away. Offer her favorite wet food warmed slightly to enhance the smell. If she licks gravy but leaves chunks, that still counts as interest—report this detail to your vet.
Litter box habits matter too. Healthy urine output means you'll see several clumps daily. If the box stays dry for 12+ hours or you notice straining, call the clinic immediately. These could signal dehydration or a blockage from kidney crystals.
When to disrupt the healing process
Some cats rebound quickly and act normal within hours post-treatment, but false recoveries happen. If she plays for a day then becomes lethargic again, that's a red flag. Likewise, vomiting more than twice in six hours warrants an urgent callback, even if her bloodwork earlier looked promising.
Watch for subtle changes in behavior like hiding under beds (unusual for your cat) or sitting hunched over. Cats mask pain until it's severe. Touch her ears and paws—if they feel cooler than usual, her circulation might be struggling.
The long-term risks you're preventing now
Successful treatment now reduces the chance of chronic kidney disease later. Cats who recover fully usually show no lasting effects, but those who had delayed treatment may need lifelong kidney support diets. Your vet will discuss this if her lab results stay abnormal.
Keep all raisin products sealed away—cats who sample them once often try again. Remember that breads and cereals often contain raisins even when you don't see them, like in cinnamon swirl loaves. Check ingredient lists before sharing any human food.
The step-by-step response, from the first minute to the vet visit, is in our Raisin Bread and Baked Goods Poisoning emergency guide.