Forest Gravity Large Cat Litter Box Enclosure
✅ PROS
- Top-entry design stops litter tracking cold — cats jump in, litter stays in the box
- Gravity-fed charcoal filter system actually neutralizes ammonia odors, not just masks them
- Large 24.8 inch " x 19.7 inch " footprint fits even 20+ lb Maine Coons without feeling cramped
❌ CONS
- Assembly requires some patience — the snap-together tabs need firm pressure and can be finicky
- No scoop included; the lid opening is wide enough for a standard scoop but tight for jumbo ones
The Verdict
Let’s be honest about cat litter boxes: most are ugly plastic trays that scatter litter across your floor and announce every deposit to the whole house. The Forest Gravity Large Cat Litter Box Enclosure tries to fix all three problems at once. After digging through 229 ratings and the spec sheet, here’s what actually matters.
What You Actually Get
The unit arrives as a two-piece enclosure: a deep base tray and a domed top with a circular entry hole. No tools needed — the pieces snap together via molded tabs. The footprint measures 24.8 inches long by 19.7 inches wide, with the top adding about 19 inches of height. That’s genuinely large. A 20-pound Maine Coon or a chunky orange tabby will fit without their back hitting the ceiling.
The standout feature is the top-entry design. Your cat jumps through the hole in the lid, does business, and jumps out. Litter that sticks to their paws falls back through the hole into the box instead of being dragged through your hallway. There’s also a recessed charcoal filter panel built into the lid that uses gravity to pull odors downward and trap them in the carbon layer.
Real-World Performance
The gravity filter isn’t marketing fluff. One reviewer noted, “I was skeptical about the charcoal filter gimmick, but after two weeks with two cats, my laundry room doesn’t smell like a litter box anymore. It actually works.” Multiple buyers echoed this — the filter genuinely neutralizes ammonia rather than just covering it with fragrance.
Cleaning is straightforward but has a learning curve. You lift the entire top off the base to scoop. The opening is wide enough for a standard scoop, but if you use one of those oversized jumbo scoops with a sifter, it’ll be tight. Some buyers mentioned that the snap-together assembly requires firm pressure — one called it “a bit of a wrestling match” on first setup, though it holds solid once clicked into place.
What Buyers Consistently Praise
Litter tracking reduction is the #1 reason people love this box. One review stated: “I went from sweeping litter three times a day to once a week. The top-entry design is genius.” Odor control runs a close second. The large size gets frequent mentions too, especially from owners of big breeds who previously had to settle for boxes that were too small.
Where It Falls Short
Assembly frustration is the most common complaint. The tabs need precise alignment and significant force to snap into place. It’s a one-time annoyance, not a recurring problem, but it’s worth knowing before you start.
No scoop is included. For a product at this price point, that’s a minor disappointment — you’ll need to buy one separately. And while the charcoal filter is effective, it’s a consumable that needs replacing every 2-3 months. Factor that into the ongoing cost.
Who Should Buy This
- Multi-cat households dealing with ammonia smell: the filter system is genuinely effective
- Owners of large breeds (Maine Coons, Ragdolls, big tomcats) who need actual floor space
- Anyone tired of sweeping litter daily — the top entry cuts tracking dramatically
- Apartment dwellers who need odor control in small spaces
Skip it if you have a senior cat or a kitten under 6 months. The top-entry jump can be tough on older joints, and tiny kittens may struggle with the height.
FAQ
Q: Is the charcoal filter replaceable? A: Yes. It’s a standard size that slides out of the lid panel. Third-party replacements are available on Amazon, or you can buy the Forest Gravity branded refills. Plan to swap it every 8-12 weeks depending on how many cats you have.
Q: Will my cat actually use a top-entry box? A: Most do, especially if you transition gradually. Place the old box next to it for a week and move a little soiled litter into the new one. The one caveat: very old or arthritic cats may refuse because of the jump height.
Q: Does it really stop litter tracking? A: It dramatically reduces it, but doesn’t eliminate it 100%. Some litter still clings to paws and gets shaken off on exit. A mat in front of the box catches the rest. Buyers consistently report cutting their sweeping frequency by 70-90%.
The Verdict: 4.6/5 — Buy it if you’re tired of litter everywhere and box smell
This is one of the better-designed litter enclosures I’ve seen. The top-entry design solves the tracking problem that plagues every open tray, and the gravity filter actually earns its keep. Assembly is annoying and the missing scoop is a minor sting, but neither is a dealbreaker. For multi-cat households or anyone with a large breed, this is a solid investment that’ll save you daily cleanup time and keep your home smelling fresh.
Skip it if you have a senior cat with mobility issues, or if you’re on a tight budget and don’t want to buy replacement filters. Otherwise, this is a buy.
Where to Buy
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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.