A stool sample sounds simple until you are standing over the litter tray wondering how much, from where, and in what. Done well, it gives your vet material that can be tested for parasites, infection, and digestive clues without putting your cat through anything at all. Done badly — too old, contaminated with cleaning product, or unlabelled — and the results can mislead or the test has to be repeated. The principles are the same whatever she is being tested for: fresh, clean, small, sealed, and labelled with the time it was passed.
What to collect it in, and how much
Use the sample pot your practice hands out if you have one; otherwise a small, clean, dry, sealable container works — wash it with hot soapy water, rinse thoroughly, and dry it completely, because detergent residue and tap water both interfere with some tests. You need far less than most owners bring: a portion about the size of a large grape is usually ample for the standard checks, and if the vet has asked for samples from several days, follow that instruction exactly and keep each day's portion in its own labelled pot. Collect with a clean disposable spoon, a gloved hand, or the pot lid itself, then wash your hands well afterwards regardless of how tidy the job felt.
Getting a genuinely fresh sample from the tray
Fresh means hours, not days. The ideal is a stool passed the same morning as the appointment, collected promptly before it dries out or gets buried and coated. If your cat uses the tray overnight, a stool found first thing is usually acceptable if you refrigerate it straight away and tell the practice when it was likely passed — but a sample of unknown age from a tray cleaned irregularly is worth little. In a multi-cat household, you may need to separate her with her own clean tray for a few hours so you know the sample is hers; if the vet wants a sample uncontaminated by litter, a tray lined with a clean plastic sheet or filled with a small amount of washed, non-absorbent material can let you lift a clean portion. Scoop from the stool itself rather than scraping the tray floor, and avoid scooping up disinfectant or a puddle of urine with it.
Storing and transporting it without ruining it
Seal the lid firmly, wipe the outside of the pot, and place it inside a sealed bag. Refrigerate it — in its bag, well away from food, ideally in a door shelf or a separate box — because warmth degrades exactly the organisms and eggs the lab is looking for, while freezing can also damage some tests, so the fridge, not the freezer, is the right holding place. Most samples should reach the practice within the same day; if your appointment is delayed, call and ask whether the sample you have is still usable or whether they would rather have a fresher one, rather than presenting an old pot and hoping. Keep it cool on the journey too, out of a hot car boot and direct sun.
Label it, time it, and tell the vet the context
Write her name, your surname, and the date and time the stool was passed on the pot before you leave — the time matters because the lab interprets freshness from it, and reception will ask if it is not there. Alongside the sample, be ready to describe what her stools have been like: softer or harder than usual, any blood or mucus you saw, a colour change, how often she is going, and whether appetite or weight has shifted. That context decides which tests are worth running on the sample you brought. Recording the passing time and those observations in KinsLe in her Pet Passport, together with her other visit records, means you answer the vet's questions from a note made at the tray rather than a guess made in the car park.