No, over a month it works out about the same as supermarket litter.

Yes. Pick the monthly plan and cancel after your first bag. No commitment: cancelling takes 2 minutes on your phone, with no need to email or call anyone.

Cancelled in just a few clicks: see for yourself.

Yes, you can move from the monthly plan to the 3-month plan, or back again, whenever you like. In a few clicks from your account, at no extra cost.

No, the crystals soak up the urine, so it doesn't sit in the tray. Bacteria find it far harder to grow on dry crystals, and each day you scoop out the poo and give the litter a stir.

Yes, a vet recommends Pacha to her clients. Developed with vets and trusted by over 35,000 cat owners.

"I even recommend it to clients at the clinic."

Marion Hergott, vet and Pacha consultant

Yes, for one cat: a single bag replaces up to 4 bags of standard clumping litter. The crystals are about five times lighter than ordinary litter.

"The exact amount of crystals in a bag makes it last a month: it absorbs a whole month's worth of wee."Marion Hergott, vet and Pacha consultant

Big tray or big cat? Just change your delivery frequency.

Cheaper per cat: with two or more cats, each bag drops from £21 to £19. Allow one bag per cat per month, even if they share a tray.

With two cats, you save £4 a month; with three, £6.

Mix Pacha with the old litter for 3 to 5 days: most cats take to it quickly. If yours really won't have it, you're covered for 30 days: your first bag is free, and there's nothing to send back.

The crystals are fine and rounded, so they barely stick to paws. And for the few that escape the tray, there's a very effective litter mat, available only to our subscribers in their account.

No, and that's on purpose: with no supermarket in the middle, nobody else takes a cut. Pacha is sold at a fair price and comes straight through your letterbox, on the schedule you choose.

No. Despite the similar name, refined silica crystals have nothing to do with the crystalline silica found in quarries. They're two different materials, classified differently.

The real issue is dust, mainly from clay litters. Cornell University lists dusty litter, along with cigarette smoke, among the suspected allergens for asthmatic cats.

And our crystals aren't the supermarket kind: they're heated to a high temperature, and the silica is refined, sieved and put through a patented filtration process, so it's virtually dust-free.

Sources: Cornell Feline Health Center and VCA Animal Hospitals (litter dust and cigarette smoke); IARC Monographs vol. 68 and vol. 100C (silica classification).

No, it's a cue, not a diagnosis: if the colour changes, speak to your vet. The litter may change colour depending on certain properties of the urine, such as its pH.