Most cat owners in America use clay. It's what the grocery aisle stocks, and it's what most of us grew up with.
But more and more households are moving off it. Here's why, category by category.
First, what is each one made of?
Clay litter is sodium bentonite, mined out of the ground. It absorbs water and swells, and that's how it clumps.
Tofu-style litter is plant fiber pressed into pellets with a starch binder. It doesn't clump by swelling — the fiber holds the liquid, and the binder sets it.
Every tofu-style litter has some stone powder in it, for hardness, and that's normal. How much is in there is a big part of what separates a good bag from a bad one, and you can check yours at the kitchen counter with a three-minute test.
Which one is less dusty?
Pour a fresh bag of clay and watch the cloud come up. Tofu-style litter doesn't do that.
And remember where your cat's face is when she digs — two inches above it, twice a day, for fifteen years. You're breathing it too, every time you scoop.
Then there's the part people don't think about. That cloud is clay, and clay swells the moment it meets water. What she breathes doesn't stop at her nose. It goes down into her lungs. And lungs are wet. What she doesn't breathe settles on her coat, and she grooms it off and swallows it. Every day. For fifteen years.
And if someone in your home has asthma or allergies, or the cat does, this is the difference you're most likely to feel.
Which one tracks less?
Clay is fine grit, so it wedges between paw pads and ends up on your floor, your couch, and your bed. Tofu-style pellets are bigger, so fewer of them leave the box at all.
The more cats you have, the worse this gets. More cats means more trips in and out of the box, and more grit carried through the house every day. That's why a multi-cat home usually notices the switch to PawHalo faster than anyone.
Which one clumps better?
Clay clumps hard. Very hard. But those clumps cement to the bottom of the pan, so you end up chiseling. Tofu-style litter clumps firm and lifts clean.
And the odor control?
Clay does a decent job while the clumps are fresh. The problem is what's left behind. Ammonia builds in the litter that stays in the pan, and by the end of a bag you can smell it from across the room.
Plant fiber works differently. It traps the ammonia rather than just holding the moisture, and wood fiber adds odor control of its own, so the box stays neutral for longer between full changes.
And the weight and price?
Tofu-style litter looks expensive on the shelf, a bigger number per pound. But weight is a poor way to judge a litter. Same cat, same stretch of time: the clay it takes to get through that stretch weighs several times what the tofu-style litter does.
Plant fiber is porous and light. It soaks up a lot of liquid without weighing much, so what you are actually buying is volume, not pounds.
That also makes PawHalo easier to carry, easier to store, and easier to have delivered.
What happens to the litter after?
Clay goes in the trash and stays in the landfill, because not breaking down is exactly what it was chosen for.
Tofu-style litter breaks down, so the litter itself is flushable. Three exceptions. Don't do it on a septic tank. Don't send a whole box down at once — a clump or two at a time. And don't flush it in California — that one is state law, not the litter. ()
It's easy to switch your cat over
Pellets feel different under her paws, so don't swap the whole box at once. Mix the new litter in a little at a time and let the ratio drift. Please read how to switch your cat to a new litter.
So who should switch?
You, if you're tired of the dust and the tracking, and tired of hauling 40-pound jugs up the stairs. Or if you have more than one cat and the smell is winning. And particularly if someone in the house has asthma or allergies — the cat counts.
Once you've switched
Give it a week or two, and you'll start noticing. The air above the box stays clear. You stop finding grit in the bed and along the hallway. The room stops announcing that a cat lives there.
That's what it should feel like.
Common questions
Is tofu-style litter safe if my cat eats it? Don't let her eat litter, of any kind. A grown cat usually won't — she digs, she covers, she walks away. Kittens are the ones to watch, because a kitten explores with her mouth and will try anything once.
And one more thing, because this one matters. A cat that keeps eating litter is telling you something. There's a name for it: pica. It can point to anemia or other health problems. So call your vet.
General information, not veterinary advice.