Cats keep quiet when something's off.
Cats are wired to hide discomfort, so changes can go unnoticed for a while. The litter box is one of the few places you can see what's going on, without stressing your cat or changing their routine.
Cat Litter Health-Check Particles: Color-Changing pH Indicator
1 set (5 bags) / Blood check (green)
$29.99
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Cat Litter Health-Check Particles: Color-Changing pH Indicator
$29.99
Color-changing indicator particles for the litter your cat already uses.
pH check (brown): changes color when your cat's urine pH moves outside the usual range.
Blood check (green): reacts to traces of blood in urine, which can be hard to spot by eye.
Free US shipping · usually 4–10 business days
30-day money-back guarantee · no need to send it back
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- Mix into the litter you already use
- Check the color when you scoop
- Know when it's time to call your vet
How to use
Scoop the box as normal. Open one bag and sprinkle it on the top layer. Check the color each time you scoop, and add a fresh bag when you change the litter.
What's included
1 set = 5 bags of 10 g.
Shipping
Free shipping on every US order. Orders ship from our US warehouse and usually arrive in 4–10 business days. You'll get a tracking link by email.
Returns
30-day money-back guarantee. Email us within 30 days of delivery and we'll refund you. You don't need to send it back.
Two simple checks
Pick the one that fits your cat, or ask your vet which is more useful.
pH check (brown)
Changes color when your cat's urine pH moves outside the usual range.
Blood check (green)
Reacts to traces of blood in urine, which can be hard to spot by eye.
How it works
1. Sprinkle
Open a bag and sprinkle it on top of your clean litter.
2. Scoop as usual
Your cat uses the box like normal. Nothing new to get used to.
3. Glance at the color
Compare it with the color chart each time you scoop.
What the colors mean
The exact colors are on the chart in each pack. The rule of thumb is the same for both types.
The usual color
Nothing to do.
A change
Look again at your next scoop.
A change that stays or comes back
Or any change in your cat's behavior: call your vet and tell them what you saw.
An easier way to keep an eye on things
Who it's for
Senior cats
Older cats can change quietly. A quick look helps you keep up.
Multi-cat homes
One glance per box, whoever used it last.
Cats with past urinary issues
Use it between visits, as your vet advises.
Peace of mind
For anyone who'd rather notice early than wonder.
Questions
Which type should I choose?
The pH check helps you notice when your cat's urine pH moves outside the usual range. The blood check reacts to traces of blood in urine. If you're not sure, ask your vet which is more useful for your cat.
Will it work with my litter?
Sprinkle it on top of the litter you already use. Light-colored clumping litter makes the color easiest to see.
How often do I replace it?
Add a fresh bag each time you fully change the litter.
How many sets do I need?
One bag at a time per litter box. One set has 5 bags, so it covers five litter changes for one box.
What should I do if the color changes?
Check again at the next scoop. If the change stays or comes back, or your cat seems different (going more often, straining, drinking more), call your vet and tell them what you saw.
Does this replace vet visits?
No. It helps you notice changes between visits so you can tell your vet what you've seen.
How long does shipping take?
Orders ship from our US warehouse and usually arrive in 4–10 business days. Shipping is free.
What if I'm not happy?
Email us within 30 days of delivery and we'll refund you. You don't need to send it back.
Try it for 30 days
If you're not happy within 30 days of delivery, email us and we'll refund you. No need to send it back.
Tailvine indicators are not medical tests and don't diagnose any condition. A color change is a reason to call your vet. Always talk to your vet about your cat's health.