CatBib vs Bells vs Keeping Cats Inside - An Honest Comparison
You know your cat catches birds. You want to do something about it. But there are so many options — bells, bright collars, bibs, catios, going full indoor — and everyone has an opinion.
We sell CatBibs, so we're obviously biased. But we also believe in the science, and we think you deserve an honest comparison. Here's every major option, what the research says, and who each one suits best.
The Quick Comparison
| Method | Bird catch reduction | Cost | Restricts cat? | Works for all bird species? |
|---|---|---|---|---|
| Bells | ~25–45% | $5-10 | No | Partially |
| Bright collar covers | 54-87% (varies) | $15-20 | No | Only colour-sighted species |
| CatBib | 81% | $25 | No | Yes — all species |
| Indoor only | 100% | Free | Yes | Yes |
| Catio/enclosure | 100% (in enclosure) | $500-5,000+ | Partially | Yes |
| Cat curfew (night only) | ~30-40% | Free | Partially | No — daytime birds still at risk |
Bells — The Default Choice
Almost every cat owner tries a bell first. They're cheap, easy to fit, and feel like the obvious solution.
The problem: Research consistently shows bells only reduce bird catches by about 25–45%. Cats are smart. They learn to move without ringing the bell — holding their head still during the stalk, only activating it during the final pounce when it's often too late for the bird anyway.
Bells also don't help birds that don't associate the sound with danger. Australian native birds haven't evolved with bell-wearing predators. The warning means nothing to them.
Best for: Cat owners who want to do something minimal. Better than nothing, but not by much for serious hunters.
Bright Collar Covers (Birdsbesafe-style)
Brightly coloured collar covers make your cat more visible to prey. The idea is sound — birds with good colour vision (parrots, honeyeaters, rosellas) can spot the cat earlier and flee.
The research: Studies show effectiveness ranging from 54% to 87%, but with a major catch — it depends entirely on the bird species. US trials looked very promising, but the Australian trial showed poorer results. Birds that rely on colour vision benefit most. Birds that detect movement (like Australian magpies, miners, and many ground-feeders) get much less protection.
The other limitation: Bright collars do almost nothing for small mammals, reptiles, or frogs. If your cat catches skinks, bandicoots, or frogs, a bright collar won't help.
Best for: Areas with high parrot and honeyeater populations. Less effective as a general solution.
CatBib
Full disclosure: we sell CatBibs, so read this with that in mind. But the science speaks for itself.
The CatBib is a lightweight neoprene bib that hangs from the collar over the cat's chest. It works in two ways: the bright colours make the cat far more visible to birds as it approaches, and it mechanically disrupts the pounce — when the cat lunges, front paws out, claws out, the bib acts as a physical barrier between the cat's claws and the prey at the critical moment.
The research: Independently tested at Murdoch University, Perth. Reduced predation of birds by 81% — 81% of cats stopped catching birds. Also reduced mammal catches by 45% and reptile/frog catches by 33%.
Key advantages: - Works on all bird species (it disrupts the cat, not the bird's perception) - Also protects mammals and reptiles - Cats can't learn to defeat it (it's physics, not behaviour) - Doesn't restrict any normal cat activity - Lightweight (under 60 grams) and machine washable
Key limitations: - Not 100% — some very aggressive hunters still catch prey (try the Big CatBib for these cats) - Some cats take a day or two to adjust - Needs an elastic insert safety collar (recommended but not compulsory)
Best for: Any cat that hunts, especially serious hunters where bells have failed.
Keeping Cats Indoors
Effectiveness: 100%. Can't argue with the maths — a cat that's inside can't catch birds outside.
Many vets, wildlife organisations, and increasingly councils recommend or require indoor-only cats. And there are real benefits for cats too: indoor cats live significantly longer on average, avoiding cars, fights, diseases, and predators.
But let's be honest about the downsides: - Transitioning an adult outdoor cat to indoor is stressful for cat and owner - Some cats genuinely struggle without outdoor access — pacing, yowling, behavioural issues - Requires enrichment investment (climbing structures, puzzle feeders, window perches) - Multiple-cat households in small spaces can be challenging
Best for: New kittens (who've never known outdoor access), cats in high-traffic areas, and owners committed to indoor enrichment.
Catios and Cat Enclosures
The "best of both worlds" option. Your cat gets outdoor air, sunlight, and stimulation. Birds and wildlife stay safe.
Pros: Highly effective, cats generally love them, adds value to your property.
Cons: Expensive ($500 for a basic kit, $2,000-5,000+ for professional installation), requires yard space, not suitable for most renters (landlords typically won't allow permanent structures), and your cat is limited to the enclosure area — they can't roam the neighbourhood.
Best for: Property owners with space and budget who want a permanent solution. Excellent combined with a CatBib for any supervised outdoor time.
Night Curfews
Keeping your cat in from dusk to dawn is increasingly common (and law in some areas). It protects nocturnal wildlife — possums, bandicoots, owls, frogs — and keeps your cat safe from nighttime dangers.
But it's not enough on its own for birds. Cats mainly hunt small mammals by night and birds by day. Nighttime curfews don't prevent hunting — they simply change the mix of prey species. Almost all bird hunting by domestic cats happens during the day, especially in the morning. Spring and summer fledgling season is predominantly a daytime risk.
Best for: Everyone — this should be the baseline, not the whole solution.
Our Honest Recommendation
Here's what we'd suggest, depending on your situation:
If your cat is already indoor-only: You're sorted. Consider a catio for enrichment.
If your cat goes outside and you want to reduce their impact: 1. Fit a CatBib — the most effective non-containment solution at 81% 2. Keep them in at night — protects nocturnal wildlife and your cat 3. Keep them in during early morning in fledgling season (Sep-Jan)
If your cat defeats the Regular CatBib: Try the Big CatBib — it's designed for more aggressive hunters.
If budget allows: A catio + CatBib for supervised garden time is the gold standard.
The worst thing to do is nothing. Even imperfect action saves wildlife.
Shop CatBibs — from $25 AUD. Free shipping Australia-wide. University-tested.