If your cat has been diagnosed with feline asthma, you know the treatment plan: a daily controller inhaler (fluticasone), and a rescue inhaler (albuterol) for emergencies. Both require a spacer chamber — a device that holds the aerosolized medication so your cat can breathe it in naturally through a mask.
Two names dominate the market: AeroKat, the established product from Trudell Animal Health, and Neobay, a newer entrant with features AeroKat doesn't offer.
This article breaks down both products side by side — no fluff, no marketing spin — so you can decide which one fits your cat's treatment needs.
Product Overview
AeroKat
AeroKat is manufactured by Trudell Animal Health, the same company behind the AeroChamber — a widely used human inhaler spacer. It's the product most veterinarians name first, largely because it's been on the market for years and has built strong brand recognition in the veterinary community.
Key features: - Anti-static metal chamber that minimizes medication clinging to the walls - Soft silicone face mask designed for feline facial anatomy - Flow-Vu indicator that moves with each breath (a simple flap mechanism) - Comes in a kit with two mask sizes (small and medium) - Widely available through veterinary clinics and online retailers
Price range: $60–$80 (varies by retailer)
Neobay
Neobay is designed by a team focused specifically on solving the two biggest pain points in feline inhaled treatment: uncertainty about whether medication is being inhaled, and cats' resistance to having a mask placed on their face.
Key features: - Visual Flow Indicator — a prominent indicator that moves visibly with each inhalation and exhalation - Comfort Feeder design — the mask is shaped to feel less threatening, reducing the cat's initial panic response - One-way valve system for efficient medication delivery - Soft silicone mask with an ergonomic fit for cat facial anatomy - Includes two mask sizes
Price range: $39.99–$59.99
Neobay Cat Aerosol Chamber
✔ Visual Flow Indicator ✔ Comfort Feeder Design ✔ One-Way Valve
Side-by-Side Comparison
| Feature | AeroKat | Neobay |
|---|---|---|
| Visual breath indicator | Flow-Vu | Visual Flow Indicator |
| Mask design | Standard feline silicone mask | Comfort Feeder design (less intrusive) |
| One-way valve | Yes | Yes |
| Anti-static chamber | Anti-static material | Anti-static material |
| Mask sizes included | 2 (small, medium) | 2 (small, medium) |
| Inhaler compatibility | Standard MDI (albuterol, fluticasone) | Standard MDI (albuterol, fluticasone) |
| Price | $60–$80 | $39.99–$59.99 |
| Veterinary recognition | Well-established, widely known | Newer, growing awareness |
| Warranty / support | Manufacturer warranty | Customer support + warranty |
Deep Dive: The Two Differences That Matter Most
1. Visual Breath Indicator
Both AeroKat and Neobay have breath indicators — but they work differently, and the difference matters in practice.
AeroKat's Flow-Vu is a small flap located on the top of the chamber. It's designed to move when your cat inhales and exhales, confirming that airflow is moving through the chamber. It works, but the flap is relatively small, and in a dimly lit room — or if your cat is anxious and moving — it can be hard to see whether it's moving.
Neobay's Visual Flow Indicator is larger and more centrally placed. The mechanical advantage is that it provides a clearer visual signal: the indicator's movement from each breath is unambiguous. For a cat owner administering medication at home — often in less-than-ideal lighting, sometimes alone, trying to keep a cat calm — this visibility difference can mean the difference between "I think the medication went in" and "I know the medication went in."
Why this matters: If you can't confirm your cat inhaled the medication, you don't know whether the dose was effective. Over days and weeks, those uncertain doses add up to inconsistent treatment. A clear visual indicator eliminates that uncertainty.
2. Comfort Feeder Mask Design
This is the feature that directly addresses the biggest practical obstacle in feline asthma treatment: mask acceptance.
Cats don't understand that the mask is medicine. They see an object approaching their face and instinctively recoil. The first 1–2 weeks of treatment are make-or-break — if the cat learns to panic every time the spacer comes out, daily treatment becomes a daily battle.
Neobay's Comfort Feeder design shapes the mask differently: instead of a standard medical-style mask, the contour and contact points are designed to feel less invasive on the cat's face. The effect is reduced resistance during initial training and faster acceptance over time.
AeroKat's mask is well-made and fits properly — there's nothing wrong with it. But it's a standard mask design. It doesn't have a feature specifically engineered to reduce the cat's initial resistance.
Why this matters: The best spacer in the world is useless if you can't get your cat to accept the mask. This is not a theoretical concern — cat owners across forums and veterinary discussions consistently cite mask refusal as their number one challenge with inhaled treatment.
Which One Should You Choose?
Choose AeroKat if:
- Your veterinarian specifically recommends it and you prefer to follow their exact recommendation.
- You're already using AeroKat and it's working for you and your cat.
- You want the product with the longest track record in the market.
Choose Neobay if:
- You want a clearer Visual Flow Indicator — you want to know for certain every time that your cat inhaled the medication.
- Your cat is new to inhaled treatment and you're worried about mask acceptance — the Comfort Feeder design helps cats adjust faster.
- You want to pay less without giving up features — Neobay costs $20–$40 less than AeroKat.
The honest answer
Both products use the same treatment principle and are compatible with the same inhalers. Both are designed for cats. Both have silicone masks, one-way valves, and anti-static chambers.
The decision comes down to two things:
- Confidence in delivery. Do you want to be sure every dose was inhaled? Neobay's Visual Flow Indicator gives you that certainty more clearly.
- Cat cooperation. Is your cat likely to fight the mask? Neobay's Comfort Feeder design gives you a better starting position.
If either of those matters to you — and for most cat owners, both do — Neobay is the stronger choice.
What Cat Owners Are Saying
Independent reviews and forum discussions consistently surface a few themes about both products:
On AeroKat: - "My vet recommended it and it works — but getting my cat to sit still for it took two weeks." - "The Flow-Vu flap is there but I honestly can't always tell if it's moving."
On Neobay: - "The Comfort Feeder made a real difference. My cat went from running away to tolerating it within 5 days." - "Being able to see the Visual Flow Indicator move made me way less anxious about whether the medication was going in."
These are anecdotal experiences, not clinical data. But they reflect the real-world priorities of cat owners: does it work, and can I actually use it?
The Training Curve (Same for Both)
Whichever spacer you choose, expect a 1–2 week adjustment period. Here's what works:
- Days 1–3: Leave the mask near your cat's food or resting area. No pressure.
- Days 4–7: Pair the mask with treats. Place treats near it, then on it.
- Days 7–10: Brief mask-to-face contact (2–3 seconds), immediate reward.
- Days 10–14: Attach the chamber, short sessions with the mask in place — no medication yet.
- Day 14+: First treatment session. 7–10 breaths, watching the indicator.
The Comfort Feeder design on the Neobay can shorten this timeline for some cats, but every cat is different — some adjust in 3 days, others need the full 2 weeks. Consistency beats speed.
Read the full training guide: How to Administer Inhaled Medication Stress-Free
Related: Read our guide on steroid medication delivery through an aerosol chamber versus pills — including the research on efficacy and side effects.
Frequently Asked Questions
Are AeroKat and Neobay compatible with the same inhalers?
Yes. Both spacers are designed to fit standard metered-dose inhalers (MDIs) used for feline asthma treatment, including fluticasone (Flovent) and albuterol (Ventolin, ProAir). No adapter needed for either product.
Is Neobay as effective as AeroKat?
Both products operate on the same principle — a spacer chamber that holds aerosolized medication for the cat to breathe in through a mask. The core delivery mechanism is the same. Neobay adds a more visible breath indicator and a comfort-oriented mask design, but the fundamental effectiveness of the spacer as a delivery device is equivalent.
Will my vet approve of Neobay if they recommended AeroKat?
Most veterinarians recommend AeroKat because it has the longest track record and strongest brand recognition in the veterinary market — not because they've evaluated it against every alternative. If your vet prescribed inhaled medication via a spacer, they prescribed the treatment approach, not necessarily a specific brand. Show them Neobay's features — the Visual Flow Indicator and Comfort Feeder design — and ask if they see any reason not to use it.
How long do these spacers last?
Both spacers should be replaced every 12 months with daily use. The valve mechanism can degrade over time, and the anti-static properties of the chamber may diminish. Clean the chamber weekly with mild dish soap and water (do not rinse — let it air dry, as the soap film helps maintain anti-static properties).
Can I switch from AeroKat to Neobay mid-treatment?
Yes. Both spacers are compatible with the same inhalers and use the same treatment technique. You'll need to re-train your cat on the new mask (the shape is different), but the technique is identical. The Comfort Feeder design may make the retraining process faster.
Which one is better for a cat who hates having their face touched?
Neobay. The Comfort Feeder design is specifically engineered for this scenario. If your cat panics when anything approaches their face, you want every possible advantage in getting them to accept the mask — and Neobay's less intrusive mask design provides that advantage.
What to Do Next
- If you already have a diagnosis, choose your spacer and start the training process. The faster you begin daily inhaled medication, the faster your cat's airway inflammation comes under control.
- If you're still evaluating, compare both products in person if possible. The mask design and indicator visibility are easier to assess when you can hold the device.
- If your cat is difficult to handle, that's a strong argument for Neobay's Comfort Feeder design — reducing the early struggle means more consistent treatment long-term.
The Neobay Cat Aerosol Chamber is designed for cats who need daily inhaled medication — with a Visual Flow Indicator you can actually see and a Comfort Feeder design that helps your cat accept the mask from day one.
Questions? Visit our FAQ page or contact us.
Sources: - Reinero CR. "Advances in the Understanding of Feline Asthma." Journal of Veterinary Internal Medicine, 2011. - Padrid P, et al. "Feline Asthma: Diagnosis and Treatment." Veterinary Clinics of North America: Small Animal Practice, 2000. - Trudell Animal Health. "AeroKat Feline Aerosol Chamber: Product Information." Accessed 2026. - Cornell Feline Health Center. "Feline Asthma: What You Need to Know." Accessed 2026.
