Clumping Clay
Dr. Elsey's Ultra
The gold standard for dust-free clay litter. Rock-solid clumps, very low dust, and excellent day-to-day usability.
Overall score
9.4/10
Cost per day
$0.51
Reviewed Mar 7, 2026
Head-to-head comparison
Dr. Elsey's Ultra vs Purina Tidy Cats: Which Should You Buy?
Ultra beat Tidy Cats on every performance reading we took, so this comes down to whether you will pay more per day. Tidy Cats wins on being in every supermarket. Ultra wins on clumps that hold together and air that stays clear.
ReviewCatLitter editorial teamUpdated Mar 7, 2026
This comparison page is maintained by the ReviewCatLitter editorial team and grounded in the same scoring framework used across the published review catalog.
Clumping Clay (Budget)
Purina Tidy Cats
A grocery-store staple with broad availability, lots of variants, and okay overall performance without excelling anywhere specific.
Overall score
7.9/10
Cost per day
$0.39
Reviewed Feb 28, 2026
Overall winner
Dr. Elsey's Ultra
Dr. Elsey's Ultra is the strongest all-around pick in this comparison for dust-sensitive homes.
Lowest daily cost
Purina Tidy Cats at $0.39/day
Budget is often the deciding factor in this tier.
Best odor control
Dr. Elsey's Ultra at Strong unscented control
Odor control often decides whether a litter feels tolerable long term.
Tracks less outside the box
Dr. Elsey's Ultra at Moderate
Tracking can be more important than overall score in small spaces.
What we actually measured
Every figure below is a reading from our own test runs, not a rating. Where a run never took a reading it says so.
| Reading | Dr. Elsey's Ultra | Purina Tidy Cats | Gap |
|---|---|---|---|
| Dust weighed per pourParticulates caught in the air while the bag goes into the box. Lower is better. | 0.03 mgbetter | 0.50 mg | 0.47 mg |
| Clumps that survived the drop testShare of clumps still whole after a three-foot drop. Higher is better. | 98%better | 62% | 36 points |
| Granules outside the boxCounted inside the 12-inch ring around the tray. Lower is better. | 18 granules | not measured | only one side measured |
| Bag priceWhat the tested bag cost. Bag sizes differ, so read it next to cost per pound. | $24.99 | $15.49 | $9.50 |
| Cost per poundBag price divided by what is in the bag. Lower is better. | $0.62 | $0.44better | $0.18 |
| Cost per dayWhat the box costs to keep running each day. Lower is better. | $0.51 | $0.39better | $0.12 |
| Cost across a yearThat daily cost carried over a full year of use. Lower is better. | $186 | $142better | $44 |
Neither run recorded ammonia after one day and ammonia after three days, so those rows are left out rather than filled in from a similar bag. The full test data shows every reading we have.
Why Dr. Elsey's Ultra wins this matchup
Primary tradeoff: Dr. Elsey's Ultra's weakest area here is tracking.
Best dust control here at 0.03mg per pour.
Strongest odor control in this set with strong unscented control.
Clumping is a real edge: rock-solid.
| Product | ||
|---|---|---|
| Overall Score | 9.4 | 7.9 |
| Pricing | ||
| Price | $24.99 | $15.49 |
| Weight | 40 lbs | 35 lbs |
| Cost / Day | $0.51 | $0.39 |
| Performance | ||
| Dust Control | 9.4 0.03mg per pour | 5.8 0.50mg per pour |
| Clumping | 9.8 Rock-solid | 7.2 Average |
| Odor Control | 8.5 Strong unscented control | 7.5 Solid for budget clay |
| Tracking Outside the Box | 7.2 Moderate | 5.9 Moderate-high |
| Value for Cost | 8.8 $0.51/day · $24.99 | 8.2 $0.39/day · $15.49 |
| Features | ||
| Type | Clumping Clay | Budget Clumping Clay |
| Flushable | ||
| Scented | No | Yes |
| Our Verdict | ||
| Best For | Dust-sensitive homes | Easy grocery-store replenishment |
| Read ReviewCheck Price | Read ReviewCheck Price | |
Best fit
Dr. Elsey's Ultra
Dr. Elsey's Ultra makes the most sense for dust-sensitive homes.
Worth it if
You want the cleanest clay experience with hard clumps and low dust.
Skip it if
You need flushable or lightweight litter.
Best fit
Purina Tidy Cats
Purina Tidy Cats makes the most sense for easy grocery-store replenishment.
Worth it if
You want a grocery-store staple with broad availability, lots of variants, and okay overall performance without excelling anywhere specific.
Skip it if
You need a formula that solves dust-sensitive homes better.
If neither option is quite right
The closest litters we have tested to this matchup, on score and on price.
Clumping Clay
Dr. Elsey's Cat Attract
Weighed 0.04mg per pour and runs at $0.56 a day.
Best for cats avoiding the litter box
Premium Clumping Clay
Boxiecat Premium
Weighed 0.04mg per pour and runs at $0.55 a day.
Best for lowest-maintenance scooping
Natural Corn + Cassava
Sustainably Yours
Weighed 0.11mg per pour and runs at $0.63 a day.
Best for best-performing natural litter shoppers
Read the full reviews
Use this page to choose a winner quickly, then open the full product reviews if you want the long-form test notes.
Keep comparing nearby options
Related matchups that share one of the same products and answer the next likely decision.
Related matchup
Dr. Elsey's Ultra vs Arm & Hammer Clump & Seal
Choose Ultra if dust or fragrance bother anyone in the house. Choose Clump & Seal if the price of the bag decides it.
Winner: Dr. Elsey's Ultra
Related matchup
Dr. Elsey's Ultra vs Boxiecat Premium
Ultra gives you the hardest clumps and the lightest dust for less money.
Winner: Dr. Elsey's Ultra
Related matchup
Dr. Elsey's Ultra vs PrettyLitter
Ultra is scoopable clay. PrettyLitter is crystals that change color to flag a health problem.
Winner: Dr. Elsey's Ultra
Related matchup
Arm & Hammer Clump & Seal vs Purina Tidy Cats
Clump & Seal is worth the step up from Tidy Cats if smell is the reason you are shopping. Tidy Cats is cheaper by the bag and easier to find.
Winner: Arm & Hammer Clump & Seal
Related matchup
Dr. Elsey's Cat Attract vs Dr. Elsey's Ultra
Buy Ultra unless your cat has stopped using the box, which is the one job Cat Attract does better.
Winner: Dr. Elsey's Cat Attract
Related matchup
Dr. Elsey's Ultra vs Arm & Hammer HardBall
Ultra is the cleaner litter. HardBall is the cheaper way to get clumps that set fast and come out in one piece.
Winner: Dr. Elsey's Ultra
Quick Answers
Which is better: Dr. Elsey's Ultra or Purina Tidy Cats?
Dr. Elsey's Ultra comes out ahead on the balance of dust, clumping, odor control, tracking and daily cost. Purina Tidy Cats is still the one to buy for easy grocery-store replenishment.
Which is cheaper per day: Dr. Elsey's Ultra or Purina Tidy Cats?
Purina Tidy Cats runs at $0.39 a day against $0.51 for Dr. Elsey's Ultra.
Which controls smell better: Dr. Elsey's Ultra or Purina Tidy Cats?
Dr. Elsey's Ultra scored higher: strong unscented control, against solid for budget clay for Purina Tidy Cats.
Which tracks less outside the litter box: Dr. Elsey's Ultra or Purina Tidy Cats?
Dr. Elsey's Ultra keeps more litter in the box: moderate, against moderate-high for Purina Tidy Cats.