Cat Health Monitoring: 53 Million Households, a 30% Vet Visit Rate, and a Wide-Open Market

Cats with early-stage kidney disease do not limp, whimper, or sleep in a slightly different spot. They drink water more often, and cat parents usually notice none of it for the first months. The changes are small and cats hide pain. By the time they take their cat to a regular vet visit, the disease is no longer in its early-sage.

This is one of the central problems in feline health, and the pet tech industry has yet to catch up.

The Demographic Shift the Industry Missed

Cat ownership in the U.S. hit 53 million households in 2025, covering 39% of all homes, according to the American Pet Products Association's 2026 Cat Report. That 53 million figure followed a 23% surge in 2024 and another 5% gain in 2025 (APPA, 2026 Cat Report: Strategic Insights from the 2025 National Pet Owners Survey).

These are not just new owners entering the category. Existing households are adding cats. Multi-cat homes with two cats rose 7% year over year and 16% since 2018. Homes with three or more cats grew 7% year over year and 45% since 2018 (APPA, 2026 Cat Report).

Gen Z now accounts for 22% of cat owners, up 10% year over year. This cohort buys differently. They spend on premium food, subscribe to delivery services, and treat their cats as family members in ways that show up in purchasing data. Cat owners spent an average of $337.53 on food alone in 2025, up 9% from the prior year (APPA, 2026 Cat Report).

The cat demographic is growing fast, spending more, and skewing younger. Everything about this profile should have triggered a wave of product development. It mostly didn't.

51 Million Cats With No Veterinary Care In the Past Year

The CATalyst Council, the veterinary industry's primary feline market authority, published data in 2025 that frames the problem in plain numbers. Only an estimated 30% of U.S. household-owned cats received a visit to a veterinary practice in 2024. For dogs, the comparable figure was 65 to 70% (CATalyst Council, 2025 Feline Market Insights Report, Volume II).

That gap has dollar signs attached. Feline veterinary practice revenue reached an estimated $12.7 billion in 2025. CATalyst Council projects a $34 billion total addressable market if cats reached the same rate of medicalization as dogs. That leaves roughly $21 billion in unrealized revenue, nearly three times the current market (CATalyst Council, 2026 Volume V Report).

Why do so many cats go without care? Three reasons stack up.

First, cats hide illness. Dogs give their owners signals: they limp visibly, eat less dramatically, change their behavior in ways people notice during walks and play. Cats withdraw quietly. A cat with hyperthyroidism or early diabetes looks mostly normal to a person who sees it every day.

Second, getting a cat to a veterinarian is physically stressful for both the animal and the owner. The carrier, the car ride, the waiting room full of dogs. Many cat owners delay visits because the process itself feels adversarial.

Third, many cat owners believe their indoor cats simply do not need as much medical attention. This is wrong, but it is understandable when nothing at home is giving them a reason to think otherwise.

Health monitoring hardware could address all three of these barriers. It catches the changes owners cannot see. It creates reasons to seek care before a crisis. It reduces the reliance on annual visits as the only window into a cat's health.

But the hardware barely exists.

The Product Landscape: Built For Dogs, Borrowed For Cats

The global pet health monitoring devices market reached $3.9 billion in 2025. Dogs held 57% of that market (P&S Market Research, 2025 report). Cats get the remainder, shared with every other species.

The products that do exist for cats fall into a few categories, and each one has constraints that limit what they can tell an owner.

Smart litter boxes. Products like CatLink's WeCare and Nestle's patented litter box monitoring system (U.S. Patent 12,080,416, granted 2024) take a different approach. They sit under or around the litter box and track weight, visit frequency, and duration. This data has diagnostic value. Changes in litter box behavior correlate with urinary tract infections, kidney disease, diabetes, and stress.

But litter box monitors measure behavior around elimination. They do not measure vital signs. They cannot detect a resting heart rate change, a respiratory rate shift, or a subtle alteration in sleep architecture. They capture what the cat does in one location for a few minutes per day.

Health-monitoring cat litter. PrettyLitter uses color-changing crystals to indicate pH levels and the potential presence of blood in urine. It has value as a screening flag. But it produces a binary signal (color changed or didn't), not continuous data, and it requires the owner to inspect the litter visually.

What the cat health monitoring space lacks is continuous, non-invasive physiological monitoring that works without a collar and without limiting data collection to a single location or behavior.

Why BCG-based monitoring changes the equation

Ballistocardiography (BCG) is a method of measuring the body's micro-movements caused by cardiac contraction and blood ejection during each heartbeat. It was first described in 1877, fell out of clinical favor for decades, and has been revived by modern sensor technology. A 2025 peer-reviewed study published in Veterinary Sciences confirmed that BCG-based wearable monitoring of heart rate and respiratory rate in dogs was non-invasive, easy to use, and allowed continuous monitoring without the shaving, electrode attachment, and stress associated with traditional ECG (Park et al., "Clinical Application of Monitoring Vital Signs in Dogs Through Ballistocardiography," Veterinary Sciences, March 2025).

BCG sensors detect vital signs through contact with the surface the animal rests on. That distinction matters enormously for cats.

A BCG-based monitor can be embedded in a bed, a mat, or a resting surface. The cat does not need to wear anything. The cat does not even need to know the device is there. For an animal that sleeps 12 to 16 hours a day, a resting-surface sensor captures a large window of continuous physiological data without any compliance requirement.

This is the gap that the PHH-23 is built to fill.

The PHH-23: continuous health data without the collar

The PHH-23 is a BCG-based continuous health monitor designed for integration into pet health hardware products.

What the PHH-23 measures. The device uses BCG sensors to capture heart rate, respiratory rate, and movement patterns from a resting surface. Because the sensing happens through contact with whatever the cat lies on, there is no collar, no harness, no wearable component for the animal to resist or lose.

Who it is for. The PHH-23 is a B2B hardware component. It is not sold directly to cat owners as a consumer device. It is designed for pet product manufacturers, smart bed companies, veterinary equipment makers, and connected-home device companies who want to add continuous health monitoring to their own products. If you make something a cat sleeps on, the PHH-23 can turn it into a health monitoring platform.

What makes it different from collar-based monitors. Collar monitors require the cat to wear something. The PHH-23 does not. Collar monitors rely on accelerometer inference for vital signs, which means they measure the cat's movement and extrapolate heart rate and respiratory data from it. BCG sensing measures the actual mechanical forces of cardiac output, which produces a different quality of physiological signal. Collar monitors collect data only while the collar is on. The PHH-23 collects data whenever the cat is resting on the equipped surface.

What makes it different from litter box monitors. Litter box monitors capture behavioral data during elimination events, which account for minutes per day. The PHH-23 captures physiological data during rest, which accounts for the majority of a cat's day. These are complementary data streams, but they are not substitutes.

Where the Cat Health Hardware Market is Heading

Companies entering the cat health monitoring space have a structural advantage right now that will not last.

The pet wearable market is growing at 13 to 18% annually depending on the segment, with Asia-Pacific forecast to advance fastest (P&S Market Research, 2025; Technavio, 2026). The cat ownership demographic is exploding. The feline care gap represents $21 billion in unrealized veterinary revenue alone, before accounting for consumer hardware sales (CATalyst Council, 2026).

Tractive's CAT 6 Mini, the most prominent cat-specific health device launched in 2026, still requires a collar. PetPace still positions cats as an add-on to its dog-first platform. Fi's cat features are "coming soon." The CATalyst Council's own chair has called the feline care gap "a call to action for the entire animal health community."

The first company to deliver continuous, non-invasive health monitoring for cats without requiring a wearable has a position that will be difficult to replicate. Not because the technology is impossible to copy, but because the data advantage compounds. A BCG monitor embedded in a cat bed collects resting heart rate baselines, respiratory patterns, and sleep architecture across thousands of cats. That dataset becomes the foundation for early disease detection algorithms that no one else can build without the same data.

If you manufacture pet beds, pet furniture, smart home devices for pets, or veterinary monitoring equipment, the window to integrate this capability is open now and will not stay open indefinitely. The Tractive launch in April 2026 signals that the market recognizes the gap. The question is who fills it with something a cat will actually use.