First 72 Hours After Cat Surgery: A Checklist

Most post-surgical problems in cats appear in the first 72 hours, and almost all of them are visible from three things: temperature, food intake, and the incision. Recovery from anesthesia takes 6 to 8 hours to full sternal alertness, a rectal temperature under 37.5 C needs active warming, not just a blanket, and a cat that eats 50% of its normal ration within 24 hours is on track. Those 3 numbers decide the week.

Hour 0 to 8: Coming Out of Anesthesia

A cat should lift its head within 30 to 60 minutes of the last gas, stand with a wobble by 2 to 3 hours, and walk reasonably by 6 to 8 hours; a cat still unable to hold its head up at 4 hours needs a call to the clinic. Keep it in a 60 by 90 cm crate or small room with a flat bed: no stairs, nothing to climb. Check gum color every hour for the first 3 hours (pink, not gray or white), and press the gum: color should return in under 2 seconds.

A Temperature Under 37.5 C Means Warm It Now

Normal rectal temperature is 37.5 to 39.2 C. Under 37.5 C, warm actively: a 40 C heat pad under half the bed (never the whole surface, so the cat can move off), a blanket over the top, and a room at 24 to 26 C. Recheck every 30 minutes. Under 37.0 C with shivering or a cat that feels cold to the touch, call the clinic; under 36.0 C is an emergency.

Never use a hot water bottle, a hairdryer or a radiator: a cat that cannot move away burns in under 10 minutes. Above 39.5 C in the first 48 hours suggests infection or pain and is worth a same-day call.

The 72-Hour Table

Time after surgery	Temperature target	Food (% of normal)	Pain dose interval	What you do
0 to 2 hours	36.5 to 38.0 C	0%	Given in clinic	Warm, flat bed, check gums hourly
2 to 6 hours	37.5 C or above	0 to 10%	5 to 8 hours	Sternal, water 10 to 15 ml
6 to 12 hours	37.5 to 39.0 C	10 to 25%	6 to 12 hours	First small meal, 20 to 30 g wet
12 to 24 hours	37.5 to 39.2 C	50%	8 to 12 hours	Incision photo, litter box within 1 m
24 to 48 hours	37.5 to 39.2 C	75%	8 to 12 hours, taper per vet	Short walks, cone check 3 times a day
48 to 72 hours	37.5 to 39.2 C	100%	As prescribed, often stopping	Weigh, full body check, call if flat

Pain: Dose by the Clock, Not by Crying

Cats hide pain, so waiting for crying means waiting too long. Give analgesics on the prescribed interval even if the cat looks comfortable: buprenorphine is commonly dosed every 6 to 12 hours, meloxicam every 24 hours, and gabapentin every 8 to 12 hours, with exact numbers set by your vet. Set 3 phone alarms, write each dose time on the fridge, and never double up for a late dose.

Signs of under-treated pain: hiding with the head lowered, refusing to move for 6 hours, a hunched posture, ears flat and turned out, or breathing over 40 per minute at rest. Never give human painkillers; a quarter of a 500 mg paracetamol tablet can kill a 4 kg cat.

The Incision: Check Three Things, Twice a Day

Check at 8 am and 8 pm in good light for exactly 3 things. First, the edges: they should meet in a straight line without a gap; a gap wider than 2 mm, or suture material pulled through the skin, is a call. Second, the discharge: a trace of clear or blood-tinged fluid in the first 24 hours is normal, but pus, a green or yellow color, or anything that smells is not. Third, the swelling: a firm ridge is expected, a soft 3 cm swelling that is hot to touch is not.

Photograph the incision daily at the same distance and light. Bruising spreading more than 2 cm beyond the wound in 12 hours, a wound that opens, or licking through the cone means the clinic that day. Do not clean with alcohol, hydrogen peroxide or iodine; dry and undisturbed heals faster.

Food: The 24-Hour Target Is Half

Offer a small meal 6 to 8 hours after surgery, 20 to 30 g of wet food, and aim for 25% of normal intake by 12 hours, 50% by 24 hours, 75% by 48 hours, and 100% by 72 hours. A 5 kg cat needs roughly 250 kcal a day; half is 125 kcal, which is about 100 g of typical wet food or 30 g of dry.

3 small meals beat 1 large one, and a cat that has eaten nothing at 24 hours, or vomits more than twice, needs a call. Water matters early: 10 to 15 ml every 1 to 2 hours once awake, 150 to 250 ml over the first day.

The Cone: 10 to 14 Days, Not 3

The collar stays on until the sutures come out, usually 10 to 14 days, and 2 to 3 days longer if the incision is on the abdomen or the cat is a determined licker. Remove it only for meals, 10 minutes at a time, supervised, never overnight.

Cats eat less with a cone on, so use a shallow 3 cm dish raised 5 cm. A collar too tight leaves a red band in 30 minutes; too loose and it comes off in a jump.

Litter and Jumping for 2 Weeks

Unscented non-clumping litter or shredded paper for 3 to 5 days, a box within 1 m of the bed with a 5 cm cut-down side, and no jump over 30 cm for 10 to 14 days: block the sofa and the cat tree, since a 1.5 m leap reopens wounds. Keep other cats apart for 48 hours, then reintroduce over 3 to 5 days with a scent swap, as in the kitten socialization checklist.

Days 3 to 14, and When to Call

By day 3 the cat should eat normally, move without a hunched back and use the box. Sutures or staples come out at 10 to 14 days with a recheck. Weigh at day 3 and day 7: a loss over 5% is a reason to call, and so is a cat still hiding at day 4.

Call the clinic the same day for: a temperature under 37.0 C or above 39.5 C, breathing over 40 per minute at rest, gums that are pale, grey, or white, no urine for 12 hours, vomiting more than twice in 12 hours, an incision that opens or discharges pus, or a cat that cannot stand. Senior cats and cats with kidney or heart disease recover more slowly, and the anesthesia plan for them is covered in anesthesia for the senior cat. If vaccination is due in the same month, move it to 2 weeks after full recovery and check the dates in the vaccine calendar rather than doubling up on a healing body.

1. Set a 2-hour timer for the first 8 hours: temperature, gum colour, breathing.
2. Write every pain dose and time on the fridge, and never shorten the interval.
3. Photograph the incision twice a day and compare side by side.
4. Weigh at day 3 and day 7; call if the loss passes 5%.
5. Block all jumps over 30 cm until the sutures are out at 10 to 14 days.

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