Care Guides

Do you know your dog's resting breathing rate? Not roughly. The number. Most of us can describe our pets in enormous detail, from the exact sound of the pre-vomit gulp to which side of the bed they claim, and yet almost nobody can answer that question. It is a shame, because a handful of simple measurements taken on an ordinary Tuesday when nothing is wrong will one day tell you more than any amount of worried staring.

The reason baselines matter is that normal ranges are wide and your individual animal sits somewhere specific inside them. A textbook says a dog's resting heart rate might be anywhere from around 60 to 140 beats per minute depending on size, which is not much use at midnight. Knowing that your own greyhound normally sits at 70 and is currently at 130 is useful immediately. Averages describe populations. You are looking after one animal.

Temperature, without the wrestling match

Normal for both dogs and cats is roughly 38 to 39.2 degrees Celsius, which is about 100.5 to 102.5 Fahrenheit. That is meaningfully warmer than us, so a pet who feels hot to your hand is usually just a pet. Ears and noses tell you nothing at all; a warm dry nose is a myth that has outlived its usefulness.

A digital rectal thermometer is the only home method that gives a number you can act on. Use a dedicated one, label it, lubricate the tip, and have someone steady the front end while you lift the tail and insert it a centimetre or two. Talk the whole time and keep it to the ten or fifteen seconds the beep takes. Aural thermometers made for pets are better than nothing, though they are fiddly to aim. If your pet genuinely will not tolerate it, stop. A bitten hand helps nobody, and the practice can take a temperature in seconds. Anything above 39.4C or below 37.5C is worth a phone call, and above 40.5C is urgent.

Pulse and the number that beats them all

You can feel a heartbeat through the chest wall on most dogs and cats. Kneel beside your pet while they are standing or lying on their side, slide a flat hand under the left elbow, and press gently until you find it. The femoral pulse, in the groove on the inside of the thigh where the leg meets the body, is the alternative and takes practice. Count for fifteen seconds and multiply by four. Big dogs run slow, often 60 to 100. Small dogs run faster, up to about 140. Cats are quicker again, commonly 140 to 220, and stress at home pushes that straight to the top of the range, so a nervous cat will always read high.

Breathing is where the real value sits, and specifically breathing while asleep. Watch the chest rise and fall and count one full in-and-out as a single breath, for thirty seconds, doubled. For a genuinely sleeping dog or cat, under 30 breaths a minute is what you want to see, and most healthy animals sit comfortably in the teens to low twenties. This one number is the single most useful thing you can track at home, and for any pet with a diagnosed heart murmur or heart disease it is close to invaluable. A sleeping respiratory rate that climbs above 30 and stays there, particularly if it is trending upwards across several days, is often the earliest sign that fluid is building in the lungs, and it shows up before coughing and before the pet seems unwell. Cardiologists ask owners to log it for exactly that reason.

Count it when your pet is properly asleep, not dozing with one ear up, and not just after a walk or on a hot day. Panting is not breathing for these purposes; you are counting quiet, resting breaths.

Gums, and the two-second test

Lift the lip and look at the gum above a canine tooth. Healthy is bubblegum pink and wet. Some dogs have naturally black or patchy pigmented gums, in which case use the inside of the lower eyelid or the tongue instead, and note which spot you use so you are always comparing like with like.

Now press a fingertip firmly against the gum for a second and let go. The spot blanches white, then the colour floods back. That refill should take one to two seconds. Slower than two suggests poor circulation. Pale or white gums, blue or grey gums, brick red gums, or yellow gums all mean phone the vet immediately, and blue or grey means go now rather than ring first. Yellow can point to liver trouble or a red blood cell problem and never waits until morning.

Do all of this on a good day. Write it in the notes app on your phone: date, temperature, pulse, sleeping breaths, gum colour, weight. Repeat it two or three times over a fortnight so you know the spread rather than one snapshot, then again every few months, and more often as your pet ages. Practising while everyone is calm also means the day you actually need a reading you get one instead of a fight.

Then know which numbers cannot wait. Sleeping respiratory rate persistently over 30 in a heart patient. Any breathing that looks laboured, with the abdomen heaving or the elbows held out from the body. A cat open-mouth breathing, which is always an emergency. Gums that are pale, blue, grey, brick red or yellow. A temperature over 40.5C or under 37.5C. A heart rate wildly outside your pet's own normal, or a pulse you cannot find at all. Collapse, or a pet who cannot stand.

None of this replaces a vet, and none of it is diagnosis. It is vocabulary. When you can say "she's breathing 44 a minute asleep, she's normally 20, and her gums took three seconds", you have handed the person on the other end of the phone something they can act on straight away.