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DIY Sifting Cat Litter Box Using Low-Cost Pine Pellets

Published on November 12, 2020Last updated October 5, 2021 โ™› By Melissa J. Will

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This homemade sifting cat litter box is very easy to make and works nicely with pine or wood pellets which are both better for the environment and save money.

For more on alternative litters, see Better Cat Litter: Low-Cost and Eco-Friendly Options.

Sifting cat litter box with pine pellets.

Pine Pellet Cat Litter System

Homemade sifting cat litter box

When we adopted our cats, I wanted a more eco-friendly, low-cost cat little system than the standard clay-based litter available at grocery and pet supply stores. I was also not interested in the pricey (but pretty looking) newer systems.

After reviewing a lot of options (see the cat litter options I researched here), I decided to try pine pellets.

Pine pellets are intended for use as bedding in horse stalls. They are simply pine materials dried at high temperatures to form pellets. I pay about $10 per bag here in Canada ($7.50 US). Check a local farm supply store like Tractor Supply (US) โ€”40 lb / 18 kg bag. You can see pine pellets here on Amazon.

While you could just use the pellets in a litter box, a “sifting” cat litter box helps minimize any odor.


Contents

  • How It Works
  • How To Test Pine Pellet Litter
  • Make a Sifting Cat Litter Box

How It Works

Pine pellets are dry wood pellets that crumble into soft sawdust when moistened. Despite calling it “sawdust,” there is no dust.

This is why they work nicely for cat litter: any pee is immediately absorbed.

A two-layer “sifting” box simply lets the sawdustโ€”which is finer but heavier than the pelletsโ€”fall to the bin below.

How To Test Pine Pellet Litter

Before making or buying a sifting cat box, you could just test pine pellets with your cats to see if they approve.

Buy one bag of pine pellets and use them in your current litter box. I’d suggest a depth of about 2 to 3 inches.

As your cats use the box, remove any solid waste (poops) with a scoop as usual. The pee (urine) will simply break the pellets down into moist sawdust.

If your cats are fine with it, consider making a new sifting box or converting your existing one. I prefer a sifting box simply because it reduces odor by isolating much of pee-soaked sawdust.

Is the sawdust from pine pellets dusty?

No, the sawdust from pine pellets is not dusty because it’s moist from cat pee.

Does the sawdust stick to the cat’s feet?

Like any moist, fine materials, traces of sawdust may stick to the cat’s feet. I keep a mat beside the bin which seems to take up any sawdust the cats might have on their paws. I never find sawdust elsewhere in the house.

Make a Sifting Cat Litter Box

YouTube video

The video shows how to make and assemble the litter box. It’s quite simple.

You drill holes in the base of one box, sit it on top of the second box, and add litter. Done.

Choose two long, low-sided plastic storage bins. I have two cats who share a box so I picked a size that suits them. The bins I got are intended for under-bed storage.

Make sure at least one bin has handles along the short ends (my bins are both the same).

You can see in the video that the handles help create a little space between the bins. This is where urine-soaked pellets (now sawdust) accumulates. By catching this stuff in the lower chamber, any odor is minimal.

Solid waste is removed with a scoop.


Kitten with big green eyes.

Related: What to Buy Your New Cat (Beyond the Basics)


To create the holes, I used a 1/4-inch drill bit and spaced the holes about an inch apart.

To avoid cracking the plastic, place a scrap piece of wood underneath the bin and push the bin down against the wood while you drill.

In the comments below, a reader also suggested running the drill in reverse as you press to reduce the chance of cracking the bin. (Thank you, Rhonda.)

Do cats like pine pellet litter?

All cats are different so it’s impossible to guess which ones might approve or not.

Ours switched to pine pellets without any issues.

When we adopted our cats, they were accustomed to using clay-based litter. In our case, the switch to pine pellets was easy. I just replaced the box one day and they adapted immediately. All cats are different though (of course) and some may not adapt as readily.

I’ve had a few people write to say they opted for a gradual transition by combining the old and new type of litters. So, if they don’t go for a quick change, perhaps try a gradual one.

And, as mentioned, you don’t need a sifting box to start. First test the pellets in your current box and decide from there.

We’ve been using this system for a few years now and I would never switch back. The cats approve and the financial savings are substantial.

Are pine pellets hard on cat feet?

There are no issues with pine pellets that we have observed. I would not use anything I thought might hurt, harm, or discourage our cats in any way. I have seen no signs of discomfort or reluctance to use the box. It’s business as usual.

What daily care is involved with a pine pellet litter system?

For maintenance, when using pine pellets as cat litter, solid waste is removed daily. Most of the the urine-soaked sawdust naturally drops to the lower bin and does not require upkeep.

I usually change the whole thing out every 10 days or so when all of the pellets have turned to sawdust.

I have a mat by the litter box which catches any sawdust from their paws and I vacuum that each week.

How much does it cost to use pine pellets for cat litter?

The cost to use pine pellets will depend on your supply cost and the volume you use. I have two cats and one 35 lb bag (16 kg) lasts around two months. Each bag is $7.50 US ($10 CAD) so it’s about $42 US per year (plus tax). The bags at Tractor Supply are bigger.

Avoid buying the same product packaged for this useโ€”I’ve seen it for twice the cost of the ones intended for horse stalls.

I know there are lots of other cat litter systems these days but, with the dual goals of keeping the cats happy while saving money, this is the best option I’ve found.

If you want more details on the pellets versus other options, I’ve written about it here: Better Cat Litter: Low-Cost and Eco-Friendly Options.

~Melissa the Empress of Dirt โ™›

Cat and sifting cat litter box with scoop.
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DIY Sifting Cat Litter Box for Wood Pellets

Easy way to make a sifting cat box perfect for wood and pine pellets.
Steps30 minutes mins
Total Time30 minutes mins
Makes: 1 Litter box
Author: Melissa J. Will
Cost: $20

Equipment

  • Cordless Drill
  • Drill bits
  • Sharpie
  • Ruler
  • Cat litter scoop
  • Plastic bins with handles

Supplies & Materials

  • 1 bag Pine pellets
  • 1 piece Scrap wood size of bottom of bin
YouTube video

Instructions

  • Mark drill hole guides on scrap piece of wood spacing them 1-inch apart.
  • Drill holes in base of one bin using 1/4-inch drill bit. To avoid cracking bin, press bottom of bin against wood below as you drill or use a step-down drill bit. TIP: Using the drill in reverse as you gently press down can reduce the chance of cracking the bin.
  • Stack bin with holes on top of the second bin.
  • Add a few inches of pine pellets.
  • Remove solid waste with scoop. Push sawdust through holes to bottom bin and clean out as needed.

Notes

Be sure to use bins with side handles which create a gap between bins when stacked allowing room for wet pellets (sawdust) to fall.ย 
To make your cat litter system more eco-friendly, consider using a pet waste compost bin if you have room outdoors and switch to truly biodegradable bags if discarding waste in garbage system.ย 
For the best deal on wood pellets, check for wood stove pellets or horse stall pellets and check that there are no added ingredients.ย 
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Cat litter box with pine pellets.
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I’m Melissa J. Will a.k.a. the Empress of Dirt (Ontario, Canada).
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