Almost everyone who picks up a litter of kittens is trying to save them. That is worth saying first, because the honest answer is that most of those kittens did not need saving, and the people who took them had no way to know that.

Here is the short version. A mother cat leaves her kittens for hours at a time. She is hunting. She is drawing attention away from the nest. She will come back, and she is almost certainly better at this than we are.

Wait before you decide

The single most useful thing you can do is nothing, for a while.

Step back far enough that a nervous cat will approach, which is further than feels natural. Forty feet is not too far. Then give it time. Two hours is a reasonable minimum. Four is better if the kittens look clean, plump, and quiet, because those are the signs of a mother who is very much still on the job.

If you cannot stay, come back. Sprinkle a ring of flour around the nest and check it later for paw prints. Low-tech, and it works.

Signs the kittens genuinely need you now

Do not wait it out if you see any of these:

• Visible injury, bleeding, or a kitten in obvious distress
• Cold to the touch, limp, or too weak to squirm away from your hand
• Thin, dirty, crusted eyes, or crying continuously rather than in bursts
• A known danger where they are lying: a road, a storm drain, a mower about to run

A cold kitten is an emergency before it is anything else. Warm slowly against your body or with a covered heat source, and do not feed a cold kitten, which is one of the few genuinely dangerous mistakes a kind person can make.

If mom does come back

Then the best outcome is usually the whole family together. Feed her. Get a shelter over them if the weather is turning. Let the kittens grow to about four weeks with her, then plan to socialize them and get her spayed before the next litter, which will otherwise arrive sooner than you expect.

That is TNR doing its actual job, and it is the difference between rescuing five kittens and preventing twenty.

Write down where you found them

Location, date, roughly how old they looked, whether a mother was seen. It takes thirty seconds and it is the piece almost everyone skips.

It matters because kittens do not appear at random. They appear where an unspayed female lives, and she will be there again in four months. A litter with an address attached tells you where to trap next. A litter without one is just kittens.

That is what colony records are for, and it is the whole reason Purralytics keeps location and litter history on the colony rather than on the individual cat. Find the pattern, stop the next litter.