First Aid Kit Refill: 12 Items, 3 Expiry Points

Audit the kit every 6 months, not once a year, and date three things the day you open them: sterile packs, liquids, and tape. Those 3 are what actually expire in a home kit, and they expire faster than the box date suggests.

The kit holds 12 items. Anything with a drug in it comes from your vet under prescription, and nobody at home decides a dose: the kit is for covering a wound, keeping a cat warm, and getting a temperature reading on the way to the clinic.

The 12 items and what each one buys you

Count them now. A kit that is missing 2 items is a kit you will not trust at 2 a.m., and most homes are missing the same 2: working scissors and a thermometer that still reads.

Item	Qty	Sealed life	In-use life
Sterile gauze pads, 4x4 in	20	3-5 y	24 h after opening a pack
Conforming bandage, 3 in	4 rolls	3 y	3 dressing changes, then discard
Self-adhesive wrap, 2 in	3 rolls	2-3 y	one wound, then discard
Medical tape, 1 in	2 rolls	2 y	replace when tack fails
Blunt-tip scissors	1	none	sharpen or replace at 12 months
Fine-tip tweezers	1	none	clean after every use
Digital thermometer	1	none	battery 12-18 months
Nitrile gloves	10 pairs	3 y	single use
Oral syringe, 5 mL, no needle	2	5 y	replace if cloudy
Saline 0.9%, 250 mL	2	2 y	30 days after opening
Foil emergency blanket	1	5 y	single use
Penlight and contact card	1 each	none	check battery at 6 months

The contact card carries 2 numbers: your vet, and the nearest 24-hour clinic. Write them by hand, because a phone that dies at the worst moment is the normal case, not the exception.

Expiry point 1: sterile packs die on opening, not on the box

A foil pouch printed 2029 is sterile until you tear it. Once opened, a gauze pad is a fabric square in a dusty drawer within 24 hours, so write the date on the pack with a marker and treat everything past day 1 as non-sterile dressing.

Buy 20 pads rather than 50. Twenty covers 2 to 3 wound changes on a medium cat, and a smaller stack gets rotated instead of fossilising at the bottom of the box for 4 years.

Expiry point 2: liquids get 30 days after opening

Saline is the one liquid worth keeping, 250 mL bottles, 2 of them, and both hit 30 days the moment the seal breaks. A bottle opened in March is not a bottle you flush a wound with in June: the tip has been in contact with air and a sink for 3 months.

Any liquid your vet prescribes follows its own label, and that label beats any general rule here. The kit itself stores no drug, so there is nothing in it to dose, mix or measure at home.

Expiry point 3: adhesive fails before the date does

Tape and self-adhesive wrap carry a 2 to 3 year date, but heat is what kills them. A kit kept in a car boot that reaches 40 to 50°C in summer will have tape that peels off a 1 kg cat leg within minutes, long before the printed year.

Test at every audit: stick a 10 cm strip to a clean glass and hang 200 g from it for 60 seconds. If it lifts, the roll goes. Replace tape every 2 years regardless of the date, and never store the kit above 30°C.

Where the kit lives

Dry, dark, 15 to 25°C, humidity under 60%, and reachable in under 30 seconds without moving furniture. The bathroom cupboard fails on humidity at 70 to 90%, and the kitchen fails on temperature next to the oven. A hallway cupboard or a labelled plastic box on a high shelf in the bedroom does the job.

Keep it out of reach of children and out of the cat's reach, which for most cats means above 1.5 m or behind a latch. A kit that has to be defended from the patient is not a kit.

The 20-minute audit, twice a year

Put a recurring date in the calendar: month 0 and month 6, 20 minutes, the same 4 checks in the same order.

Empty the box onto a table and wipe it: 2 minutes.
Check the 3 expiry points and write dates on anything opened today: 8 minutes.
Test the thermometer against a known reading, and the penlight: 5 minutes.
Rewrite the contact card and note the cat's current weight in kg: 5 minutes.

Split everything into 3 piles: keep, replace this week, discard now. Anything with 3 months or less left on the label goes into the replace pile before it becomes an emergency-week problem.

Why home kits fail on the same 4 points

Missing scissors, expired saline, a dead thermometer, and gauze in one size only. A 4x4 in pad is right for a leg and useless on a 2 cm eyelid wound, so the kit carries 2 sizes or the dressing gets improvised with kitchen paper.

The kit also has to match the cat. A 7 kg Maine Coon needs the 4 in conforming bandage, a 3 kg kitten does not, and wrapping material that is too wide will not hold on a slim leg.

What the kit cannot do

It cannot clean a puncture, decide whether a wound needs closing, or replace a vet at 3 a.m. Bite wounds from another cat look like 2 small holes and turn into an abscess in 24 to 72 hours, which is a clinic visit, not a dressing.

For the wound-care steps themselves, including what a normal 48-hour check looks like, use the kit check walkthrough. For the annual cost of keeping a cat, the cost calculator prices the consumables at 100 to 200 RMB a year. Chocolate and other food poisonings run on a different clock: the chocolate timeline starts at the first 30 minutes, not at the next audit.

Refill list for the next 6 months

Replace both saline bottles if either seal is broken; 2 x 250 mL.
Add 10 gauze pads and 1 roll each of tape and self-adhesive wrap.
Change the thermometer battery at month 12 even if it still works.
Re-date every opened pack with a marker, not a sticker that falls off.
Photograph the finished kit and the contact card, and keep both photos on your phone.

Frequently asked

How often should a cat first aid kit be replaced?

Audit it every 6 months and replace liquids at 30 days after opening, adhesives every 2 years, and sterile packs once they are torn open. Most items keep 3 to 5 years sealed, so a full replacement is rarely needed at once.

Can I keep human medicine in the kit for emergencies?

No. Human painkillers and cold remedies are a common cause of poisoning in cats, and no dose is safe to guess at home. Every drug in the kit comes from your vet under prescription, with the label telling you what to do.

What is the single most useful item in the kit?

A thermometer that works. A reading above 39.2°C or below 37.5°C changes the decision about whether to drive to a clinic tonight, and no other item in a 12-piece kit gives you a number that clear.