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This guide is a home-care support tool. It does not replace personalized advice from your veterinarian. For any questions, contact us at 514 223-1197.
Why test your pet's urine
A simple urine sample tells your vet a lot about your dog's or cat's health. The lab checks its concentration and looks for red and white blood cells, bacteria, crystals, and sugar (glucose); protein or hormone testing can be added when needed. The analysis helps your vet spot:
Urinary infections
Cystitis, bladder infection.
Metabolic problems
Diabetes, kidney disease, and other imbalances.
Clues under the microscope
Blood, crystals, or bacteria.
The collection method matters
How the urine is collected determines what the lab can do with it, so your vet may ask for a specific method. At home, you collect a 'free-catch' sample, mid-stream, while your pet urinates: that is the method in this guide. At the clinic, the team can also collect urine by cystocentesis (a fine needle guided into the bladder through the abdominal wall, a procedure of a few seconds, generally very well tolerated, similar to a blood draw), which is the best method when a urine culture is needed, or by catheterization (a sterile tube passed up the urethra).
The best time: the first urine of the day
Ideally, collect the first pee of the morning: that urine sat in the bladder overnight and holds more cells to examine, and your pet naturally needs to go soon after waking. Depending on the planned tests, your vet may want one very fresh sample brought in right away, or several samples spread over 2 to 3 days. Ask the team what applies to your pet before you start.
Collecting your dog's urine
It all happens on the morning walk, on leash. With the right container and a little anticipation, a few seconds are all you need.
What you need
- A clean, dry container for the collection: wide and shallow for a female who squats (an aluminum pie plate works well), deeper for a male who lifts his leg (a plastic tub, like a margarine container, to limit splashing).
- A clean container with a lid for transport (the clinic can provide a sterile one), plus a zip-top bag.
- Exam gloves (latex or nitrile), simply to keep your hands clean and dry.
- A damp paper towel (optional): if you can see debris around the vulva or prepuce, wipe it away gently before heading out. No need to disinfect.
- A permanent marker to write your pet's name and the date and time of collection: the time matters to the lab.
Household container? Wash it, then rinse it thoroughly
A reused container works very well as long as it is washed in hot water and rinsed abundantly. Invisible traces of soap, fat, or sugar react with our test chemistry and can completely skew the results. Make sure it is perfectly dry before you leave.
Step by step
Get ready to head out
Put on the gloves and grab the collection container. Let your dog see and sniff it ahead of time: they will be less distracted at the key moment. Hold the container by the rim, with a gloved hand.
Go out on a short leash
Head to their usual spot and let them sniff around normally, staying about a metre away, near the hindquarters. Two people make it easier: one holds the leash, the other the container. Taking longer to go with you nearby? Just extend the walk.
Let the first seconds pass
When your dog starts to pee, do not catch it right away: let the first 1 to 2 seconds flow. The goal is a cleaner, mid-stream sample.
Slide the container in
For a squatting female, slide the container in from behind, under the stream. For a male lifting his leg, hold the container out and catch the stream in the air.
Pull it out as soon as you have enough
A very small amount is enough: 1 to 2 tablespoons (15 to 30 mL), estimated by eye. Pull the container away even if your dog is still going; if you wait for the end, they may step in it or knock it over.
Close, label, keep it cool
Put the lid on (or set the container somewhere safe while they finish their business), transfer to the transport container if needed, slip everything into a zip-top bag, and write the name, date, and time. Then head to the clinic, or to the fridge in the meantime.
Is your dog startled or wary?
If they freeze, tuck their tail, or walk away, do not chase them: bathroom time has to stay positive. Praise them, offer a small treat, and let them finish in peace. If they still refuse after one or two gentle tries, do not worry: our team can collect the sample at the clinic. What matters most is keeping their trust.
Collecting your cat's urine
You cannot follow a cat around with a container: everything happens in the litter box, with a substrate that does not absorb urine.
The simplest method: the Kit4Cat kit
We recommend (and carry at the clinic) the Kit4Cat kit: a hydrophobic litter that repels urine, with a pipette and a collection vial. It is the most reliable method for most cats, and it has its own detailed guide. See the kit guide
No kit? The non-absorbent pellet method
Empty and clean the box
Empty the litter box completely, wash it, rinse it well, and dry it. Do not put any regular litter back in.
Pour in the non-absorbent pellets
Spread 1 to 2 cups (250 to 500 mL) of non-absorbent plastic pellets over the bottom of the box. These collection pellets, available at the clinic, give your cat a texture to scratch without absorbing the urine.
Let your cat do their thing
Place the box in a quiet spot and let them use it at their own pace. Several cats at home? Isolate the right cat with this box, so you are sure whose sample it is.
Pour the urine into the container
Tilt the box toward a corner and pour the urine (or draw it up with a pipette) into the transport container. Write the name, date, and time, then head to the clinic or the fridge.
Careful with 'silica pearls'
Do not mix them up: crystal or silica-pearl litter sold in pet stores absorbs urine instantly and will not work for collection. Use only non-absorbent pellets designed for collection, or the hydrophobic litter from the kit.
Your cat refuses the change?
Some very particular cats will not accept a new substrate, and that is okay. The simplest option is then to have the sample collected by cystocentesis at the clinic: talk to us and we will plan the collection with you.
Storage and timing: what matters
A fresh sample gives reliable results. Urine changes over time (pH, crystals, cells), which can skew the analysis. A small fresh sample beats a large stale one.
Ideal: 1 to 2 hours
Bring the sample as soon as possible after collection.
Acceptable: 12 to 24 hours
Refrigerated, and for some tests only. Always tell the team the collection time.
Golden rule: never freeze the urine
Freezing destroys cells and creates artificial crystals that make the microscopic analysis impossible. The fridge is enough.
The exception: if your vet is measuring protein loss over several days, they may ask you to freeze small volumes from several pees, then also bring a fresh sample on drop-off day. Only freeze if you were given that exact instruction, and follow it to the letter.
Label the container
Your pet's name, the date, and the exact time of collection: the time lets the lab tell apart what came from the bladder and what appeared in the container as the sample aged.
And the results?
Most results are available within 36 hours or less. Urine hormone testing is the exception: allow several days.
When to call us
Two situations deserve a call before you keep trying to collect, plus an easy way out if nothing works.
A cat straining without producing urine: an emergency
If your cat (especially a male) is straining in the litter box, crying, going back again and again, or producing only a few drops, stop the collection and call us immediately at 514 223-1197. These signs can indicate a urinary blockage, a life-threatening emergency. Clinic closed? See our emergency page to find an open centre.
Your pet is leaking urine constantly
If they dribble small amounts or cannot pass a normal volume at once, home collection becomes difficult, and those signs are worth describing to the team. Call us before multiplying the attempts: we will tell you whether collecting at the clinic is the better option.
Not comfortable collecting, or nothing is working?
That is completely normal, and common. Call us at 514 223-1197: our team will collect the sample during your visit. Just make sure your dog does not pee right before walking into the clinic, and keep your cat away from the litter box for a few hours before the appointment.
Your questions, our answers
The most common questions about collecting urine at home.
How much urine do you need?
The sample has hair, leaves, or snow in it. Is that a problem?
Urine mixed with stool: is that okay?
How do I stack the odds for the right moment?
I have several cats. How can I be sure whose sample it is?
My pet keeps trying to pee, or leaks small drops. What should I do?
I would rather the clinic handle it. Is that possible?
A little preparation, and you are set
The right container, the first pee of the morning, a mid-stream sample, a label with the time, and quickly into the cold: that is the essence of it. At the slightest hitch, a wary dog, a cat snubbing the pellets, call us: there is always another way to get a good sample.
See also
A question about collection?
Unsure about the sample, a pet that will not cooperate, or signs that worry you? Our team can guide you or collect it directly at the clinic.